Liturgical Calendar

OnlineCredit Usage:1 per callLatency:246ms avg

Liturgical Calendar is a simple tool for getting the dates of the Liturgical Calendar. It returns the dates of the Liturgical Calendar for a given year.

This API provides reliable and fast access to liturgical calendar data through a simple REST interface. Built for developers who need consistent, high-quality results with minimal setup time.

To use this API, you need an API key. You can get one by creating a free account and visiting your dashboard.

View API in Directory

GET Endpoint

URL

https://api.apiverve.com/v1/liturgicalcalendar

Code Examples

Here are examples of how to call this API in different programming languages:

cURL Request

curl -X GET \
  "https://api.apiverve.com/v1/liturgicalcalendar?month=12&year=2025" \
  -H "X-API-Key: your_api_key_here"

JavaScript (Fetch API)

const response = await fetch('https://api.apiverve.com/v1/liturgicalcalendar?month=12&year=2025', {
  method: 'GET',
  headers: {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
  }
});

const data = await response.json();
console.log(data);

Python (Requests)

import requests

headers = {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
}

response = requests.get('https://api.apiverve.com/v1/liturgicalcalendar?month=12&year=2025', headers=headers)

data = response.json()
print(data)

Node.js (Native HTTPS)

const https = require('https');
const url = require('url');

const options = {
  method: 'GET',
  headers: {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
  }
};

const req = https.request('https://api.apiverve.com/v1/liturgicalcalendar?month=12&year=2025', options, (res) => {
  let data = '';
  res.on('data', (chunk) => data += chunk);
  res.on('end', () => console.log(JSON.parse(data)));
});

req.end();

PHP (cURL)

<?php

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, 'https://api.apiverve.com/v1/liturgicalcalendar?month=12&year=2025');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'GET');
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'X-API-Key: your_api_key_here',
    'Content-Type: application/json'
]);

$response = curl_exec($ch);
curl_close($ch);

$data = json_decode($response, true);
print_r($data);

?>

Go (net/http)

package main

import (
    "fmt"
    "io"
    "net/http"

)

func main() {
    req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/liturgicalcalendar?month=12&year=2025", nil)

    req.Header.Set("X-API-Key", "your_api_key_here")
    req.Header.Set("Content-Type", "application/json")

    client := &http.Client{}
    resp, err := client.Do(req)
    if err != nil {
        panic(err)
    }
    defer resp.Body.Close()

    body, _ := io.ReadAll(resp.Body)
    fmt.Println(string(body))
}

Ruby (Net::HTTP)

require 'net/http'
require 'json'

uri = URI('https://api.apiverve.com/v1/liturgicalcalendar?month=12&year=2025')
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true

request = Net::HTTP::Get.new(uri)
request['X-API-Key'] = 'your_api_key_here'
request['Content-Type'] = 'application/json'

response = http.request(request)
puts JSON.pretty_generate(JSON.parse(response.body))

C# (HttpClient)

using System;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;

class Program
{
    static async Task Main(string[] args)
    {
        using var client = new HttpClient();
        client.DefaultRequestHeaders.Add("X-API-Key", "your_api_key_here");

        var response = await client.GetAsync("https://api.apiverve.com/v1/liturgicalcalendar?month=12&year=2025");
        response.EnsureSuccessStatusCode();

        var responseBody = await response.Content.ReadAsStringAsync();
        Console.WriteLine(responseBody);
    }
}

Authentication

This API requires authentication via API key. Include your API key in the request header:

Required Header

X-API-Key: your_api_key_here

Interactive API Playground

Test this API directly in your browser with live requests and responses.

Open in API PlaygroundTest with your API key in the dashboard

Parameters

The following parameters are available for this API endpoint:

Parameter	Type	Required	Description	Default	Example
month	integer	No	The two digit month you want to get the Liturgical Calendar data for (default: current month)	-	02
year	integer	No	The 4 digit year you want to get the Liturgical Calendar data for (default: current year)	-	2025

Response

The API returns responses in JSON, XML, YAML, Markdown, and CSV formats:

Example Responses

JSON Response

200 OK

{
  "status": "ok",
  "error": null,
  "data": {
    "2025-12-01": [
      {
        "id": "advent_1_monday",
        "date": "2025-12-01",
        "dateDef": {
          "dateFn": "unprivilegedWeekdayOfAdvent",
          "dateArgs": [
            1,
            1
          ],
          "yearOffset": 0
        },
        "dateExceptions": [],
        "alternativeTransferDateDefs": [],
        "precedence": "WEEKDAY_13",
        "rank": "WEEKDAY",
        "allowSimilarRankItems": false,
        "isHolyDayOfObligation": false,
        "isOptional": false,
        "i18nDef": [
          "seasons:advent.weekday",
          {
            "week": 1,
            "dow": 1
          }
        ],
        "seasons": [
          "ADVENT"
        ],
        "periods": [],
        "colors": [
          "PURPLE"
        ],
        "commonsDef": [],
        "martyrology": [],
        "titles": [],
        "calendar": {
          "weekOfSeason": 1,
          "dayOfSeason": 2,
          "dayOfWeek": 1,
          "nthDayOfWeekInMonth": 1,
          "startOfSeason": "2025-11-30",
          "endOfSeason": "2025-12-24",
          "startOfLiturgicalYear": "2025-11-30",
          "endOfLiturgicalYear": "2026-11-28",
          "seasons": [
            "ADVENT"
          ]
        },
        "cycles": {
          "properCycle": "PROPER_OF_TIME",
          "sundayCycle": "YEAR_A",
          "weekdayCycle": "YEAR_2",
          "psalterWeek": "WEEK_1"
        },
        "fromCalendarId": "ProperOfTime",
        "fromExtendedCalendars": []
      }
    ],
    "2025-12-02": [
      {
        "id": "advent_1_tuesday",
        "date": "2025-12-02",
        "dateDef": {
          "dateFn": "unprivilegedWeekdayOfAdvent",
          "dateArgs": [
            2,
            1
          ],
          "yearOffset": 0
        },
        "dateExceptions": [],
        "alternativeTransferDateDefs": [],
        "precedence": "WEEKDAY_13",
        "rank": "WEEKDAY",
        "allowSimilarRankItems": false,
        "isHolyDayOfObligation": false,
        "isOptional": false,
        "i18nDef": [
          "seasons:advent.weekday",
          {
            "week": 1,
            "dow": 2
          }
        ],
        "seasons": [
          "ADVENT"
        ],
        "periods": [],
        "colors": [
          "PURPLE"
        ],
        "commonsDef": [],
        "martyrology": [],
        "titles": [],
        "calendar": {
          "weekOfSeason": 1,
          "dayOfSeason": 3,
          "dayOfWeek": 2,
          "nthDayOfWeekInMonth": 1,
          "startOfSeason": "2025-11-30",
          "endOfSeason": "2025-12-24",
          "startOfLiturgicalYear": "2025-11-30",
          "endOfLiturgicalYear": "2026-11-28",
          "seasons": [
            "ADVENT"
          ]
        },
        "cycles": {
          "properCycle": "PROPER_OF_TIME",
          "sundayCycle": "YEAR_A",
          "weekdayCycle": "YEAR_2",
          "psalterWeek": "WEEK_1"
        },
        "fromCalendarId": "ProperOfTime",
        "fromExtendedCalendars": []
      }
    ],
    "2025-12-03": [
      {
        "id": "francis_xavier_priest",
        "date": "2025-12-03",
        "dateDef": {
          "month": 12,
          "date": 3
        },
        "dateExceptions": [],
        "alternativeTransferDateDefs": [],
        "precedence": "GENERAL_MEMORIAL_10",
        "rank": "MEMORIAL",
        "allowSimilarRankItems": false,
        "isHolyDayOfObligation": false,
        "isOptional": false,
        "i18nDef": [
          "names:francis_xavier_priest"
        ],
        "seasons": [
          "ADVENT"
        ],
        "periods": [],
        "colors": [
          "WHITE"
        ],
        "commonsDef": [
          "None"
        ],
        "martyrology": [],
        "titles": [],
        "calendar": {
          "weekOfSeason": 1,
          "dayOfSeason": 4,
          "dayOfWeek": 3,
          "nthDayOfWeekInMonth": 1,
          "startOfSeason": "2025-11-30",
          "endOfSeason": "2025-12-24",
          "startOfLiturgicalYear": "2025-11-30",
          "endOfLiturgicalYear": "2026-11-28",
          "seasons": [
            "ADVENT"
          ]
        },
        "cycles": {
          "properCycle": "PROPER_OF_SAINTS",
          "sundayCycle": "YEAR_A",
          "weekdayCycle": "YEAR_2",
          "psalterWeek": "WEEK_1"
        },
        "fromCalendarId": "ma",
        "fromExtendedCalendars": [],
        "weekday": {
          "id": "advent_1_wednesday",
          "date": "2025-12-03",
          "dateDef": {
            "dateFn": "unprivilegedWeekdayOfAdvent",
            "dateArgs": [
              3,
              1
            ],
            "yearOffset": 0
          },
          "dateExceptions": [],
          "alternativeTransferDateDefs": [],
          "precedence": "WEEKDAY_13",
          "rank": "WEEKDAY",
          "allowSimilarRankItems": false,
          "isHolyDayOfObligation": false,
          "isOptional": false,
          "i18nDef": [
            "seasons:advent.weekday",
            {
              "week": 1,
              "dow": 3
            }
          ],
          "seasons": [
            "ADVENT"
          ],
          "periods": [],
          "colors": [
            "PURPLE"
          ],
          "commonsDef": [],
          "martyrology": [],
          "titles": [],
          "calendar": {
            "weekOfSeason": 1,
            "dayOfSeason": 4,
            "dayOfWeek": 3,
            "nthDayOfWeekInMonth": 1,
            "startOfSeason": "2025-11-30",
            "endOfSeason": "2025-12-24",
            "startOfLiturgicalYear": "2025-11-30",
            "endOfLiturgicalYear": "2026-11-28",
            "seasons": [
              "ADVENT"
            ]
          },
          "cycles": {
            "properCycle": "PROPER_OF_TIME",
            "sundayCycle": "YEAR_A",
            "weekdayCycle": "YEAR_2",
            "psalterWeek": "WEEK_1"
          },
          "fromCalendarId": "ProperOfTime",
          "fromExtendedCalendars": []
        }
      }
    ],
    "2025-12-04": [
      {
        "id": "advent_1_thursday",
        "date": "2025-12-04",
        "dateDef": {
          "dateFn": "unprivilegedWeekdayOfAdvent",
          "dateArgs": [
            4,
            1
          ],
          "yearOffset": 0
        },
        "dateExceptions": [],
        "alternativeTransferDateDefs": [],
        "precedence": "WEEKDAY_13",
        "rank": "WEEKDAY",
        "allowSimilarRankItems": false,
        "isHolyDayOfObligation": false,
        "isOptional": false,
        "i18nDef": [
          "seasons:advent.weekday",
          {
            "week": 1,
            "dow": 4
          }
        ],
        "seasons": [
          "ADVENT"
        ],
        "periods": [],
        "colors": [
          "PURPLE"
        ],
        "commonsDef": [],
        "martyrology": [],
        "titles": [],
        "calendar": {
          "weekOfSeason": 1,
          "dayOfSeason": 5,
          "dayOfWeek": 4,
          "nthDayOfWeekInMonth": 1,
          "startOfSeason": "2025-11-30",
          "endOfSeason": "2025-12-24",
          "startOfLiturgicalYear": "2025-11-30",
          "endOfLiturgicalYear": "2026-11-28",
          "seasons": [
            "ADVENT"
          ]
        },
        "cycles": {
          "properCycle": "PROPER_OF_TIME",
          "sundayCycle": "YEAR_A",
          "weekdayCycle": "YEAR_2",
          "psalterWeek": "WEEK_1"
        },
        "fromCalendarId": "ProperOfTime",
        "fromExtendedCalendars": []
      },
      {
        "id": "john_damascene_priest",
        "date": "2025-12-04",
        "dateDef": {
          "month": 12,
          "date": 4
        },
        "dateExceptions": [],
        "alternativeTransferDateDefs": [],
        "precedence": "OPTIONAL_MEMORIAL_12",
        "rank": "OPTIONAL_MEMORIAL",
        "allowSimilarRankItems": false,
        "isHolyDayOfObligation": false,
        "isOptional": true,
        "i18nDef": [
          "names:john_damascene_priest"
        ],
        "seasons": [
          "ADVENT"
        ],
        "periods": [],
        "colors": [
          "WHITE"
        ],
        "commonsDef": [
          "Pastors",
          "DoctorsOfTheChurch"
        ],
        "martyrology": [],
        "titles": [],
        "calendar": {
          "weekOfSeason": 1,
          "dayOfSeason": 5,
          "dayOfWeek": 4,
          "nthDayOfWeekInMonth": 1,
          "startOfSeason": "2025-11-30",
          "endOfSeason": "2025-12-24",
          "startOfLiturgicalYear": "2025-11-30",
          "endOfLiturgicalYear": "2026-11-28",
          "seasons": [
            "ADVENT"
          ]
        },
        "cycles": {
          "properCycle": "PROPER_OF_SAINTS",
          "sundayCycle": "YEAR_A",
          "weekdayCycle": "YEAR_2",
          "psalterWeek": "WEEK_1"
        },
        "fromCalendarId": "ma",
        "fromExtendedCalendars": [],
        "weekday": {
          "id": "advent_1_thursday",
          "date": "2025-12-04",
          "dateDef": {
            "dateFn": "unprivilegedWeekdayOfAdvent",
            "dateArgs": [
              4,
              1
            ],
            "yearOffset": 0
          },
          "dateExceptions": [],
          "alternativeTransferDateDefs": [],
          "precedence": "WEEKDAY_13",
          "rank": "WEEKDAY",
          "allowSimilarRankItems": false,
          "isHolyDayOfObligation": false,
          "isOptional": false,
          "i18nDef": [
            "seasons:advent.weekday",
            {
              "week": 1,
              "dow": 4
            }
          ],
          "seasons": [
            "ADVENT"
          ],
          "periods": [],
          "colors": [
            "PURPLE"
          ],
          "commonsDef": [],
          "martyrology": [],
          "titles": [],
          "calendar": {
            "weekOfSeason": 1,
            "dayOfSeason": 5,
            "dayOfWeek": 4,
            "nthDayOfWeekInMonth": 1,
            "startOfSeason": "2025-11-30",
            "endOfSeason": "2025-12-24",
            "startOfLiturgicalYear": "2025-11-30",
            "endOfLiturgicalYear": "2026-11-28",
            "seasons": [
              "ADVENT"
            ]
          },
          "cycles": {
            "properCycle": "PROPER_OF_TIME",
            "sundayCycle": "YEAR_A",
            "weekdayCycle": "YEAR_2",
            "psalterWeek": "WEEK_1"
          },
          "fromCalendarId": "ProperOfTime",
          "fromExtendedCalendars": []
        }
      }
    ],
    "2025-12-05": [
      {
        "id": "advent_1_friday",
        "date": "2025-12-05",
        "dateDef": {
          "dateFn": "unprivilegedWeekdayOfAdvent",
          "dateArgs": [
            5,
            1
          ],
          "yearOffset": 0
        },
        "dateExceptions": [],
        "alternativeTransferDateDefs": [],
        "precedence": "WEEKDAY_13",
        "rank": "WEEKDAY",
        "allowSimilarRankItems": false,
        "isHolyDayOfObligation": false,
        "isOptional": false,
        "i18nDef": [
          "seasons:advent.weekday",
          {
            "week": 1,
            "dow": 5
          }
        ],
        "seasons": [
          "ADVENT"
        ],
        "periods": [],
        "colors": [
          "PURPLE"
        ],
        "commonsDef": [],
        "martyrology": [],
        "titles": [],
        "calendar": {
          "weekOfSeason": 1,
          "dayOfSeason": 6,
          "dayOfWeek": 5,
          "nthDayOfWeekInMonth": 1,
          "startOfSeason": "2025-11-30",
          "endOfSeason": "2025-12-24",
          "startOfLiturgicalYear": "2025-11-30",
          "endOfLiturgicalYear": "2026-11-28",
          "seasons": [
            "ADVENT"
          ]
        },
        "cycles": {
          "properCycle": "PROPER_OF_TIME",
          "sundayCycle": "YEAR_A",
          "weekdayCycle": "YEAR_2",
          "psalterWeek": "WEEK_1"
        },
        "fromCalendarId": "ProperOfTime",
        "fromExtendedCalendars": []
      }
    ],
    "2025-12-06": [
      {
        "id": "advent_1_saturday",
        "date": "2025-12-06",
        "dateDef": {
          "dateFn": "unprivilegedWeekdayOfAdvent",
          "dateArgs": [
            6,
            1
          ],
          "yearOffset": 0
        },
        "dateExceptions": [],
        "alternativeTransferDateDefs": [],
        "precedence": "WEEKDAY_13",
        "rank": "WEEKDAY",
        "allowSimilarRankItems": false,
        "isHolyDayOfObligation": false,
        "isOptional": false,
        "i18nDef": [
          "seasons:advent.weekday",
          {
            "week": 1,
            "dow": 6
          }
        ],
        "seasons": [
          "ADVENT"
        ],
        "periods": [],
        "colors": [
          "PURPLE"
        ],
        "commonsDef": [],
        "martyrology": [],
        "titles": [],
        "calendar": {
          "weekOfSeason": 1,
          "dayOfSeason": 7,
          "dayOfWeek": 6,
          "nthDayOfWeekInMonth": 1,

  // ... response truncated (2990 total lines)

XML Response

200 OK

<Root>
  <status>ok</status>
  <error />
  <data>
    <_x0032_025-12-01>
      <id>advent_1_monday</id>
      <date>2025-12-01</date>
      <dateDef>
        <dateFn>unprivilegedWeekdayOfAdvent</dateFn>
        <dateArgs>1</dateArgs>
        <dateArgs>1</dateArgs>
        <yearOffset>0</yearOffset>
      </dateDef>
      <precedence>WEEKDAY_13</precedence>
      <rank>WEEKDAY</rank>
      <allowSimilarRankItems>false</allowSimilarRankItems>
      <isHolyDayOfObligation>false</isHolyDayOfObligation>
      <isOptional>false</isOptional>
      <i18nDef>seasons:advent.weekday</i18nDef>
      <i18nDef>
        <week>1</week>
        <dow>1</dow>
      </i18nDef>
      <seasons>ADVENT</seasons>
      <colors>PURPLE</colors>
      <calendar>
        <weekOfSeason>1</weekOfSeason>
        <dayOfSeason>2</dayOfSeason>
        <dayOfWeek>1</dayOfWeek>
        <nthDayOfWeekInMonth>1</nthDayOfWeekInMonth>
        <startOfSeason>2025-11-30</startOfSeason>
        <endOfSeason>2025-12-24</endOfSeason>
        <startOfLiturgicalYear>2025-11-30</startOfLiturgicalYear>
        <endOfLiturgicalYear>2026-11-28</endOfLiturgicalYear>
        <seasons>ADVENT</seasons>
      </calendar>
      <cycles>
        <properCycle>PROPER_OF_TIME</properCycle>
        <sundayCycle>YEAR_A</sundayCycle>
        <weekdayCycle>YEAR_2</weekdayCycle>
        <psalterWeek>WEEK_1</psalterWeek>
      </cycles>
      <fromCalendarId>ProperOfTime</fromCalendarId>
    </_x0032_025-12-01>
    <_x0032_025-12-02>
      <id>advent_1_tuesday</id>
      <date>2025-12-02</date>
      <dateDef>
        <dateFn>unprivilegedWeekdayOfAdvent</dateFn>
        <dateArgs>2</dateArgs>
        <dateArgs>1</dateArgs>
        <yearOffset>0</yearOffset>
      </dateDef>
      <precedence>WEEKDAY_13</precedence>
      <rank>WEEKDAY</rank>
      <allowSimilarRankItems>false</allowSimilarRankItems>
      <isHolyDayOfObligation>false</isHolyDayOfObligation>
      <isOptional>false</isOptional>
      <i18nDef>seasons:advent.weekday</i18nDef>
      <i18nDef>
        <week>1</week>
        <dow>2</dow>
      </i18nDef>
      <seasons>ADVENT</seasons>
      <colors>PURPLE</colors>
      <calendar>
        <weekOfSeason>1</weekOfSeason>
        <dayOfSeason>3</dayOfSeason>
        <dayOfWeek>2</dayOfWeek>
        <nthDayOfWeekInMonth>1</nthDayOfWeekInMonth>
        <startOfSeason>2025-11-30</startOfSeason>
        <endOfSeason>2025-12-24</endOfSeason>
        <startOfLiturgicalYear>2025-11-30</startOfLiturgicalYear>
        <endOfLiturgicalYear>2026-11-28</endOfLiturgicalYear>
        <seasons>ADVENT</seasons>
      </calendar>
      <cycles>
        <properCycle>PROPER_OF_TIME</properCycle>
        <sundayCycle>YEAR_A</sundayCycle>
        <weekdayCycle>YEAR_2</weekdayCycle>
        <psalterWeek>WEEK_1</psalterWeek>
      </cycles>
      <fromCalendarId>ProperOfTime</fromCalendarId>
    </_x0032_025-12-02>
    <_x0032_025-12-03>
      <id>francis_xavier_priest</id>
      <date>2025-12-03</date>
      <dateDef>
        <month>12</month>
        <date>3</date>
      </dateDef>
      <precedence>GENERAL_MEMORIAL_10</precedence>
      <rank>MEMORIAL</rank>
      <allowSimilarRankItems>false</allowSimilarRankItems>
      <isHolyDayOfObligation>false</isHolyDayOfObligation>
      <isOptional>false</isOptional>
      <i18nDef>names:francis_xavier_priest</i18nDef>
      <seasons>ADVENT</seasons>
      <colors>WHITE</colors>
      <commonsDef>None</commonsDef>
      <calendar>
        <weekOfSeason>1</weekOfSeason>
        <dayOfSeason>4</dayOfSeason>
        <dayOfWeek>3</dayOfWeek>
        <nthDayOfWeekInMonth>1</nthDayOfWeekInMonth>
        <startOfSeason>2025-11-30</startOfSeason>
        <endOfSeason>2025-12-24</endOfSeason>
        <startOfLiturgicalYear>2025-11-30</startOfLiturgicalYear>
        <endOfLiturgicalYear>2026-11-28</endOfLiturgicalYear>
        <seasons>ADVENT</seasons>
      </calendar>
      <cycles>
        <properCycle>PROPER_OF_SAINTS</properCycle>
        <sundayCycle>YEAR_A</sundayCycle>
        <weekdayCycle>YEAR_2</weekdayCycle>
        <psalterWeek>WEEK_1</psalterWeek>
      </cycles>
      <fromCalendarId>ma</fromCalendarId>
      <weekday>
        <id>advent_1_wednesday</id>
        <date>2025-12-03</date>
        <dateDef>
          <dateFn>unprivilegedWeekdayOfAdvent</dateFn>
          <dateArgs>3</dateArgs>
          <dateArgs>1</dateArgs>
          <yearOffset>0</yearOffset>
        </dateDef>
        <precedence>WEEKDAY_13</precedence>
        <rank>WEEKDAY</rank>
        <allowSimilarRankItems>false</allowSimilarRankItems>
        <isHolyDayOfObligation>false</isHolyDayOfObligation>
        <isOptional>false</isOptional>
        <i18nDef>seasons:advent.weekday</i18nDef>
        <i18nDef>
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<!-- ... response truncated (2035 total lines) -->

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# ... response truncated (2357 total lines)

Markdown Response

200 OK

| Field | Value |
| --- | --- |
| status | ok |
| error |  |
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CSV Response

200 OK

status	error	2025-12-01	2025-12-02	2025-12-03	2025-12-04	2025-12-05	2025-12-06	2025-12-07	2025-12-08	2025-12-09	2025-12-10	2025-12-11	2025-12-12	2025-12-13	2025-12-14	2025-12-15	2025-12-16	2025-12-17	2025-12-18	2025-12-19	2025-12-20	2025-12-21	2025-12-22	2025-12-23	2025-12-24	2025-12-25	2025-12-26	2025-12-27	2025-12-28	2025-12-29	2025-12-30	2025-12-31
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{id:john_damascene_priest,date:2025-12-04,dateDef:{month:12,date:4},dateExceptions:[],alternativeTransferDateDefs:[],precedence:OPTIONAL_MEMORIAL_12,rank:OPTIONAL_MEMORIAL,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:true,i18nDef:[names:john_damascene_priest],seasons:[ADVENT],periods:[],colors:[WHITE],commonsDef:[Pastors,DoctorsOfTheChurch],martyrology:[],titles:[],calendar:{weekOfSeason:1,dayOfSeason:5,dayOfWeek:4,nthDayOfWeekInMonth:1,startOfSeason:2025-11-30,endOfSeason:2025-12-24,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[ADVENT]},cycles:{properCycle:PROPER_OF_SAINTS,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_1},fromCalendarId:ma,fromExtendedCalendars:[],weekday:{id:advent_1_thursday,date:2025-12-04,dateDef:{dateFn:unprivilegedWeekdayOfAdvent,dateArgs:[4,1],yearOffset:0},dateExceptions:[],alternativeTransferDateDefs:[],precedence:WEEKDAY_13,rank:WEEKDAY,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:false,i18nDef:[seasons:advent.weekday,{week:1,dow:4}],seasons:[ADVENT],periods:[],colors:[PURPLE],commonsDef:[],martyrology:[],titles:[],calendar:{weekOfSeason:1,dayOfSeason:5,dayOfWeek:4,nthDayOfWeekInMonth:1,startOfSeason:2025-11-30,endOfSeason:2025-12-24,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[ADVENT]},cycles:{properCycle:PROPER_OF_TIME,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_1},fromCalendarId:ProperOfTime,fromExtendedCalendars:[]}}	{id:advent_1_friday,date:2025-12-05,dateDef:{dateFn:unprivilegedWeekdayOfAdvent,dateArgs:[5,1],yearOffset:0},dateExceptions:[],alternativeTransferDateDefs:[],precedence:WEEKDAY_13,rank:WEEKDAY,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:false,i18nDef:[seasons:advent.weekday,{week:1,dow:5}],seasons:[ADVENT],periods:[],colors:[PURPLE],commonsDef:[],martyrology:[],titles:[],calendar:{weekOfSeason:1,dayOfSeason:6,dayOfWeek:5,nthDayOfWeekInMonth:1,startOfSeason:2025-11-30,endOfSeason:2025-12-24,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[ADVENT]},cycles:{properCycle:PROPER_OF_TIME,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_1},fromCalendarId:ProperOfTime,fromExtendedCalendars:[]}	{id:advent_1_saturday,date:2025-12-06,dateDef:{dateFn:unprivilegedWeekdayOfAdvent,dateArgs:[6,1],yearOffset:0},dateExceptions:[],alternativeTransferDateDefs:[],precedence:WEEKDAY_13,rank:WEEKDAY,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:false,i18nDef:[seasons:advent.weekday,{week:1,dow:6}],seasons:[ADVENT],periods:[],colors:[PURPLE],commonsDef:[],martyrology:[],titles:[],calendar:{weekOfSeason:1,dayOfSeason:7,dayOfWeek:6,nthDayOfWeekInMonth:1,startOfSeason:2025-11-30,endOfSeason:2025-12-24,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[ADVENT]},cycles:{properCycle:PROPER_OF_TIME,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_1},fromCalendarId:ProperOfTime,fromExtendedCalendars:[]}; {id:nicholas_of_myra_bishop,date:2025-12-06,dateDef:{month:12,date:6},dateExceptions:[],alternativeTransferDateDefs:[],precedence:OPTIONAL_MEMORIAL_12,rank:OPTIONAL_MEMORIAL,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:true,i18nDef:[names:nicholas_of_myra_bishop],seasons:[ADVENT],periods:[],colors:[WHITE],commonsDef:[Bishops],martyrology:[],titles:[],calendar:{weekOfSeason:1,dayOfSeason:7,dayOfWeek:6,nthDayOfWeekInMonth:1,startOfSeason:2025-11-30,endOfSeason:2025-12-24,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[ADVENT]},cycles:{properCycle:PROPER_OF_SAINTS,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_1},fromCalendarId:ma,fromExtendedCalendars:[],weekday:{id:advent_1_saturday,date:2025-12-06,dateDef:{dateFn:unprivilegedWeekdayOfAdvent,dateArgs:[6,1],yearOffset:0},dateExceptions:[],alternativeTransferDateDefs:[],precedence:WEEKDAY_13,rank:WEEKDAY,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:false,i18nDef:[seasons:advent.weekday,{week:1,dow:6}],seasons:[ADVENT],periods:[],colors:[PURPLE],commonsDef:[],martyrology:[],titles:[],calendar:{weekOfSeason:1,dayOfSeason:7,dayOfWeek:6,nthDayOfWeekInMonth:1,startOfSeason:2025-11-30,endOfSeason:2025-12-24,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[ADVENT]},cycles:{properCycle:PROPER_OF_TIME,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_1},fromCalendarId:ProperOfTime,fromExtendedCalendars:[]}}	{id:advent_2_sunday,date:2025-12-07,dateDef:{dateFn:sundayOfAdvent,dateArgs:[2],yearOffset:0},dateExceptions:[],alternativeTransferDateDefs:[],precedence:PRIVILEGED_SUNDAY_2,rank:SUNDAY,allowSimilarRankItems:false,isHolyDayOfObligation:true,isOptional:false,i18nDef:[seasons:advent.sunday,{week:2}],seasons:[ADVENT],periods:[],colors:[PURPLE],commonsDef:[],martyrology:[],titles:[],calendar:{weekOfSeason:2,dayOfSeason:8,dayOfWeek:0,nthDayOfWeekInMonth:1,startOfSeason:2025-11-30,endOfSeason:2025-12-24,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[ADVENT]},cycles:{properCycle:PROPER_OF_TIME,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_2},fromCalendarId:ProperOfTime,fromExtendedCalendars:[]}	{id:immaculate_conception_of_the_blessed_virgin_mary,date:2025-12-08,dateDef:{dateFn:immaculateConceptionOfMary},dateExceptions:[],alternativeTransferDateDefs:[],precedence:GENERAL_SOLEMNITY_3,rank:SOLEMNITY,allowSimilarRankItems:false,isHolyDayOfObligation:true,isOptional:false,i18nDef:[names:immaculate_conception_of_the_blessed_virgin_mary],seasons:[ADVENT],periods:[],colors:[WHITE],commonsDef:[None],martyrology:[],titles:[],calendar:{weekOfSeason:2,dayOfSeason:9,dayOfWeek:1,nthDayOfWeekInMonth:2,startOfSeason:2025-11-30,endOfSeason:2025-12-24,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[ADVENT]},cycles:{properCycle:PROPER_OF_SAINTS,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_2},fromCalendarId:ma,fromExtendedCalendars:[]}	{id:advent_2_tuesday,date:2025-12-09,dateDef:{dateFn:unprivilegedWeekdayOfAdvent,dateArgs:[2,2],yearOffset:0},dateExceptions:[],alternativeTransferDateDefs:[],precedence:WEEKDAY_13,rank:WEEKDAY,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:false,i18nDef:[seasons:advent.weekday,{week:2,dow:2}],seasons:[ADVENT],periods:[],colors:[PURPLE],commonsDef:[],martyrology:[],titles:[],calendar:{weekOfSeason:2,dayOfSeason:10,dayOfWeek:2,nthDayOfWeekInMonth:2,startOfSeason:2025-11-30,endOfSeason:2025-12-24,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[ADVENT]},cycles:{properCycle:PROPER_OF_TIME,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_2},fromCalendarId:ProperOfTime,fromExtendedCalendars:[]}; {id:juan_diego_cuauhtlatoatzin,date:2025-12-09,dateDef:{month:12,date:9},dateExceptions:[],alternativeTransferDateDefs:[],precedence:OPTIONAL_MEMORIAL_12,rank:OPTIONAL_MEMORIAL,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:true,i18nDef:[names:juan_diego_cuauhtlatoatzin],seasons:[ADVENT],periods:[],colors:[WHITE],commonsDef:[Saints],martyrology:[],titles:[],calendar:{weekOfSeason:2,dayOfSeason:10,dayOfWeek:2,nthDayOfWeekInMonth:2,startOfSeason:2025-11-30,endOfSeason:2025-12-24,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[ADVENT]},cycles:{properCycle:PROPER_OF_SAINTS,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_2},fromCalendarId:ma,fromExtendedCalendars:[],weekday:{id:advent_2_tuesday,date:2025-12-09,dateDef:{dateFn:unprivilegedWeekdayOfAdvent,dateArgs:[2,2],yearOffset:0},dateExceptions:[],alternativeTransferDateDefs:[],precedence:WEEKDAY_13,rank:WEEKDAY,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:false,i18nDef:[seasons:advent.weekday,{week:2,dow:2}],seasons:[ADVENT],periods:[],colors:[PURPLE],commonsDef:[],martyrology:[],titles:[],calendar:{weekOfSeason:2,dayOfSeason:10,dayOfWeek:2,nthDayOfWeekInMonth:2,startOfSeason:2025-11-30,endOfSeason:2025-12-24,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[ADVENT]},cycles:{properCycle:PROPER_OF_TIME,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_2},fromCalendarId:ProperOfTime,fromExtendedCalendars:[]}}	{id:advent_2_wednesday,date:2025-12-10,dateDef:{dateFn:unprivilegedWeekdayOfAdvent,dateArgs:[3,2],yearOffset:0},dateExceptions:[],alternativeTransferDateDefs:[],precedence:WEEKDAY_13,rank:WEEKDAY,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:false,i18nDef:[seasons:advent.weekday,{week:2,dow:3}],seasons:[ADVENT],periods:[],colors:[PURPLE],commonsDef:[],martyrology:[],titles:[],calendar:{weekOfSeason:2,dayOfSeason:11,dayOfWeek:3,nthDayOfWeekInMonth:2,startOfSeason:2025-11-30,endOfSeason:2025-12-24,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[ADVENT]},cycles:{properCycle:PROPER_OF_TIME,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_2},fromCalendarId:ProperOfTime,fromExtendedCalendars:[]}; 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{id:damasus_i_pope,date:2025-12-11,dateDef:{month:12,date:11},dateExceptions:[],alternativeTransferDateDefs:[],precedence:OPTIONAL_MEMORIAL_12,rank:OPTIONAL_MEMORIAL,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:true,i18nDef:[names:damasus_i_pope],seasons:[ADVENT],periods:[],colors:[WHITE],commonsDef:[PopeOrBishop],martyrology:[],titles:[],calendar:{weekOfSeason:2,dayOfSeason:12,dayOfWeek:4,nthDayOfWeekInMonth:2,startOfSeason:2025-11-30,endOfSeason:2025-12-24,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[ADVENT]},cycles:{properCycle:PROPER_OF_SAINTS,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_2},fromCalendarId:ma,fromExtendedCalendars:[],weekday:{id:advent_2_thursday,date:2025-12-11,dateDef:{dateFn:unprivilegedWeekdayOfAdvent,dateArgs:[4,2],yearOffset:0},dateExceptions:[],alternativeTransferDateDefs:[],precedence:WEEKDAY_13,rank:WEEKDAY,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:false,i18nDef:[seasons:advent.weekday,{week:2,dow:4}],seasons:[ADVENT],periods:[],colors:[PURPLE],commonsDef:[],martyrology:[],titles:[],calendar:{weekOfSeason:2,dayOfSeason:12,dayOfWeek:4,nthDayOfWeekInMonth:2,startOfSeason:2025-11-30,endOfSeason:2025-12-24,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[ADVENT]},cycles:{properCycle:PROPER_OF_TIME,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_2},fromCalendarId:ProperOfTime,fromExtendedCalendars:[]}}	{id:advent_2_friday,date:2025-12-12,dateDef:{dateFn:unprivilegedWeekdayOfAdvent,dateArgs:[5,2],yearOffset:0},dateExceptions:[],alternativeTransferDateDefs:[],precedence:WEEKDAY_13,rank:WEEKDAY,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:false,i18nDef:[seasons:advent.weekday,{week:2,dow:5}],seasons:[ADVENT],periods:[],colors:[PURPLE],commonsDef:[],martyrology:[],titles:[],calendar:{weekOfSeason:2,dayOfSeason:13,dayOfWeek:5,nthDayOfWeekInMonth:2,startOfSeason:2025-11-30,endOfSeason:2025-12-24,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[ADVENT]},cycles:{properCycle:PROPER_OF_TIME,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_2},fromCalendarId:ProperOfTime,fromExtendedCalendars:[]}; 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bligation:false,isOptional:false,i18nDef:[seasons:advent.privileged_weekday,{day:23}],seasons:[ADVENT],periods:[],colors:[PURPLE],commonsDef:[],martyrology:[],titles:[],calendar:{weekOfSeason:4,dayOfSeason:24,dayOfWeek:2,nthDayOfWeekInMonth:4,startOfSeason:2025-11-30,endOfSeason:2025-12-24,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[ADVENT]},cycles:{properCycle:PROPER_OF_TIME,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_4},fromCalendarId:ProperOfTime,fromExtendedCalendars:[]}; {id:john_of_kanty_priest,date:2025-12-23,dateDef:{month:12,date:23},dateExceptions:[],alternativeTransferDateDefs:[],precedence:OPTIONAL_MEMORIAL_12,rank:OPTIONAL_MEMORIAL,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:true,i18nDef:[names:john_of_kanty_priest],seasons:[ADVENT],periods:[],colors:[],commonsDef:[Pastors,MercyWorkers],martyrology:[],titles:[],calendar:{weekOfSeason:4,dayOfSeason:24,dayOfWeek:2,nthDayOfWeekInMonth:4,startOfSeason:2025-11-30,endOfSeason:2025-12-24,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[ADVENT]},cycles:{properCycle:PROPER_OF_SAINTS,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_4},fromCalendarId:ma,fromExtendedCalendars:[],weekday:{id:advent_december_23,date:2025-12-23,dateDef:{dateFn:privilegedWeekdayOfAdvent,dateArgs:[23],yearOffset:0},dateExceptions:[],alternativeTransferDateDefs:[],precedence:PRIVILEGED_WEEKDAY_9,rank:WEEKDAY,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:false,i18nDef:[seasons:advent.privileged_weekday,{day:23}],seasons:[ADVENT],periods:[],colors:[PURPLE],commonsDef:[],martyrology:[],titles:[],calendar:{weekOfSeason:4,dayOfSeason:24,dayOfWeek:2,nthDayOfWeekInMonth:4,startOfSeason:2025-11-30,endOfSeason:2025-12-24,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[ADVENT]},cycles:{properCycle:PROPER_OF_TIME,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_4},fromCalendarId:ProperOfTime,fromExtendedCalendars:[]}}	{id:advent_december_24,date:2025-12-24,dateDef:{dateFn:privilegedWeekdayOfAdvent,dateArgs:[24],yearOffset:0},dateExceptions:[],alternativeTransferDateDefs:[],precedence:PRIVILEGED_WEEKDAY_9,rank:WEEKDAY,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:false,i18nDef:[seasons:advent.privileged_weekday,{day:24}],seasons:[ADVENT],periods:[],colors:[PURPLE],commonsDef:[],martyrology:[],titles:[],calendar:{weekOfSeason:4,dayOfSeason:25,dayOfWeek:3,nthDayOfWeekInMonth:4,startOfSeason:2025-11-30,endOfSeason:2025-12-24,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[ADVENT]},cycles:{properCycle:PROPER_OF_TIME,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_4},fromCalendarId:ProperOfTime,fromExtendedCalendars:[]}	{id:nativity_of_the_lord,date:2025-12-25,dateDef:{dateFn:christmas,yearOffset:0},dateExceptions:[],alternativeTransferDateDefs:[],precedence:PROPER_OF_TIME_SOLEMNITY_2,rank:SOLEMNITY,allowSimilarRankItems:false,isHolyDayOfObligation:true,isOptional:false,i18nDef:[names:nativity_of_the_lord],seasons:[CHRISTMAS_TIME],periods:[CHRISTMAS_OCTAVE,CHRISTMAS_TO_PRESENTATION_OF_THE_LORD],colors:[WHITE],commonsDef:[],martyrology:[],titles:[],calendar:{weekOfSeason:1,dayOfSeason:1,dayOfWeek:4,nthDayOfWeekInMonth:4,startOfSeason:2025-12-25,endOfSeason:2026-01-11,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[CHRISTMAS_TIME]},cycles:{properCycle:PROPER_OF_TIME,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_4},fromCalendarId:ProperOfTime,fromExtendedCalendars:[]}	{id:stephen_the_first_martyr,date:2025-12-26,dateDef:{month:12,date:26},dateExceptions:[],alternativeTransferDateDefs:[],precedence:GENERAL_FEAST_7,rank:FEAST,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:false,i18nDef:[names:stephen_the_first_martyr],seasons:[CHRISTMAS_TIME],periods:[CHRISTMAS_OCTAVE,CHRISTMAS_TO_PRESENTATION_OF_THE_LORD],colors:[RED],commonsDef:[None],martyrology:[],titles:[],calendar:{weekOfSeason:1,dayOfSeason:2,dayOfWeek:5,nthDayOfWeekInMonth:4,startOfSeason:2025-12-25,endOfSeason:2026-01-11,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[CHRISTMAS_TIME]},cycles:{properCycle:PROPER_OF_SAINTS,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_4},fromCalendarId:ma,fromExtendedCalendars:[],weekday:{id:christmas_octave_day_2,date:2025-12-26,dateDef:{dateFn:weekdayWithinOctaveOfChristmas,dateArgs:[2],yearOffset:0},dateExceptions:[],alternativeTransferDateDefs:[],precedence:PRIVILEGED_WEEKDAY_9,rank:WEEKDAY,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:false,i18nDef:[seasons:christmas_time.octave,{count:2}],seasons:[CHRISTMAS_TIME],periods:[CHRISTMAS_OCTAVE,CHRISTMAS_TO_PRESENTATION_OF_THE_LORD],colors:[WHITE],commonsDef:[],martyrology:[],titles:[],calendar:{weekOfSeason:1,dayOfSeason:2,dayOfWeek:5,nthDayOfWeekInMonth:4,startOfSeason:2025-12-25,endOfSeason:2026-01-11,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[CHRISTMAS_TIME]},cycles:{properCycle:PROPER_OF_TIME,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_4},fromCalendarId:ProperOfTime,fromExtendedCalendars:[]}}	{id:john_apostle,date:2025-12-27,dateDef:{month:12,date:27},dateExceptions:[],alternativeTransferDateDefs:[],precedence:GENERAL_FEAST_7,rank:FEAST,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:false,i18nDef:[names:john_apostle],seasons:[CHRISTMAS_TIME],periods:[CHRISTMAS_OCTAVE,CHRISTMAS_TO_PRESENTATION_OF_THE_LORD],colors:[WHITE],commonsDef:[None],martyrology:[],titles:[],calendar:{weekOfSeason:1,dayOfSeason:3,dayOfWeek:6,nthDayOfWeekInMonth:4,startOfSeason:2025-12-25,endOfSeason:2026-01-11,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[CHRISTMAS_TIME]},cycles:{properCycle:PROPER_OF_SAINTS,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_4},fromCalendarId:ma,fromExtendedCalendars:[],weekday:{id:christmas_octave_day_3,date:2025-12-27,dateDef:{dateFn:weekdayWithinOctaveOfChristmas,dateArgs:[3],yearOffset:0},dateExceptions:[],alternativeTransferDateDefs:[],precedence:PRIVILEGED_WEEKDAY_9,rank:WEEKDAY,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:false,i18nDef:[seasons:christmas_time.octave,{count:3}],seasons:[CHRISTMAS_TIME],periods:[CHRISTMAS_OCTAVE,CHRISTMAS_TO_PRESENTATION_OF_THE_LORD],colors:[WHITE],commonsDef:[],martyrology:[],titles:[],calendar:{weekOfSeason:1,dayOfSeason:3,dayOfWeek:6,nthDayOfWeekInMonth:4,startOfSeason:2025-12-25,endOfSeason:2026-01-11,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[CHRISTMAS_TIME]},cycles:{properCycle:PROPER_OF_TIME,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_4},fromCalendarId:ProperOfTime,fromExtendedCalendars:[]}}	{id:holy_family_of_jesus_mary_and_joseph,date:2025-12-28,dateDef:{dateFn:holyFamily,yearOffset:0},dateExceptions:[],alternativeTransferDateDefs:[],precedence:GENERAL_LORD_FEAST_5,rank:FEAST,allowSimilarRankItems:false,isHolyDayOfObligation:true,isOptional:false,i18nDef:[names:holy_family_of_jesus_mary_and_joseph],seasons:[CHRISTMAS_TIME],periods:[CHRISTMAS_OCTAVE,CHRISTMAS_TO_PRESENTATION_OF_THE_LORD],colors:[WHITE],commonsDef:[],martyrology:[],titles:[],calendar:{weekOfSeason:2,dayOfSeason:4,dayOfWeek:0,nthDayOfWeekInMonth:4,startOfSeason:2025-12-25,endOfSeason:2026-01-11,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[CHRISTMAS_TIME]},cycles:{properCycle:PROPER_OF_TIME,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_1},fromCalendarId:ProperOfTime,fromExtendedCalendars:[]}	{id:christmas_octave_day_5,date:2025-12-29,dateDef:{dateFn:weekdayWithinOctaveOfChristmas,dateArgs:[5],yearOffset:0},dateExceptions:[],alternativeTransferDateDefs:[],precedence:PRIVILEGED_WEEKDAY_9,rank:WEEKDAY,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:false,i18nDef:[seasons:christmas_time.octave,{count:5}],seasons:[CHRISTMAS_TIME],periods:[CHRISTMAS_OCTAVE,CHRISTMAS_TO_PRESENTATION_OF_THE_LORD],colors:[WHITE],commonsDef:[],martyrology:[],titles:[],calendar:{weekOfSeason:2,dayOfSeason:5,dayOfWeek:1,nthDayOfWeekInMonth:5,startOfSeason:2025-12-25,endOfSeason:2026-01-11,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[CHRISTMAS_TIME]},cycles:{properCycle:PROPER_OF_TIME,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_1},fromCalendarId:ProperOfTime,fromExtendedCalendars:[]}; {id:thomas_becket_bishop,date:2025-12-29,dateDef:{month:12,date:29},dateExceptions:[],alternativeTransferDateDefs:[],precedence:OPTIONAL_MEMORIAL_12,rank:OPTIONAL_MEMORIAL,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:true,i18nDef:[names:thomas_becket_bishop],seasons:[CHRISTMAS_TIME],periods:[CHRISTMAS_OCTAVE,CHRISTMAS_TO_PRESENTATION_OF_THE_LORD],colors:[],commonsDef:[Martyrs,Bishops],martyrology:[],titles:[],calendar:{weekOfSeason:2,dayOfSeason:5,dayOfWeek:1,nthDayOfWeekInMonth:5,startOfSeason:2025-12-25,endOfSeason:2026-01-11,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[CHRISTMAS_TIME]},cycles:{properCycle:PROPER_OF_SAINTS,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_1},fromCalendarId:ma,fromExtendedCalendars:[],weekday:{id:christmas_octave_day_5,date:2025-12-29,dateDef:{dateFn:weekdayWithinOctaveOfChristmas,dateArgs:[5],yearOffset:0},dateExceptions:[],alternativeTransferDateDefs:[],precedence:PRIVILEGED_WEEKDAY_9,rank:WEEKDAY,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:false,i18nDef:[seasons:christmas_time.octave,{count:5}],seasons:[CHRISTMAS_TIME],periods:[CHRISTMAS_OCTAVE,CHRISTMAS_TO_PRESENTATION_OF_THE_LORD],colors:[WHITE],commonsDef:[],martyrology:[],titles:[],calendar:{weekOfSeason:2,dayOfSeason:5,dayOfWeek:1,nthDayOfWeekInMonth:5,startOfSeason:2025-12-25,endOfSeason:2026-01-11,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[CHRISTMAS_TIME]},cycles:{properCycle:PROPER_OF_TIME,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_1},fromCalendarId:ProperOfTime,fromExtendedCalendars:[]}}	{id:christmas_octave_day_6,date:2025-12-30,dateDef:{dateFn:weekdayWithinOctaveOfChristmas,dateArgs:[6],yearOffset:0},dateExceptions:[],alternativeTransferDateDefs:[],precedence:PRIVILEGED_WEEKDAY_9,rank:WEEKDAY,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:false,i18nDef:[seasons:christmas_time.octave,{count:6}],seasons:[CHRISTMAS_TIME],periods:[CHRISTMAS_OCTAVE,CHRISTMAS_TO_PRESENTATION_OF_THE_LORD],colors:[WHITE],commonsDef:[],martyrology:[],titles:[],calendar:{weekOfSeason:2,dayOfSeason:6,dayOfWeek:2,nthDayOfWeekInMonth:5,startOfSeason:2025-12-25,endOfSeason:2026-01-11,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[CHRISTMAS_TIME]},cycles:{properCycle:PROPER_OF_TIME,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_1},fromCalendarId:ProperOfTime,fromExtendedCalendars:[]}	{id:christmas_octave_day_7,date:2025-12-31,dateDef:{dateFn:weekdayWithinOctaveOfChristmas,dateArgs:[7],yearOffset:0},dateExceptions:[],alternativeTransferDateDefs:[],precedence:PRIVILEGED_WEEKDAY_9,rank:WEEKDAY,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:false,i18nDef:[seasons:christmas_time.octave,{count:7}],seasons:[CHRISTMAS_TIME],periods:[CHRISTMAS_OCTAVE,CHRISTMAS_TO_PRESENTATION_OF_THE_LORD],colors:[WHITE],commonsDef:[],martyrology:[],titles:[],calendar:{weekOfSeason:2,dayOfSeason:7,dayOfWeek:3,nthDayOfWeekInMonth:5,startOfSeason:2025-12-25,endOfSeason:2026-01-11,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[CHRISTMAS_TIME]},cycles:{properCycle:PROPER_OF_TIME,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_1},fromCalendarId:ProperOfTime,fromExtendedCalendars:[]}; {id:sylvester_i_pope,date:2025-12-31,dateDef:{month:12,date:31},dateExceptions:[],alternativeTransferDateDefs:[],precedence:OPTIONAL_MEMORIAL_12,rank:OPTIONAL_MEMORIAL,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:true,i18nDef:[names:sylvester_i_pope],seasons:[CHRISTMAS_TIME],periods:[CHRISTMAS_OCTAVE,CHRISTMAS_TO_PRESENTATION_OF_THE_LORD],colors:[],commonsDef:[PopeOrBishop],martyrology:[],titles:[],calendar:{weekOfSeason:2,dayOfSeason:7,dayOfWeek:3,nthDayOfWeekInMonth:5,startOfSeason:2025-12-25,endOfSeason:2026-01-11,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[CHRISTMAS_TIME]},cycles:{properCycle:PROPER_OF_SAINTS,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_1},fromCalendarId:ma,fromExtendedCalendars:[],weekday:{id:christmas_octave_day_7,date:2025-12-31,dateDef:{dateFn:weekdayWithinOctaveOfChristmas,dateArgs:[7],yearOffset:0},dateExceptions:[],alternativeTransferDateDefs:[],precedence:PRIVILEGED_WEEKDAY_9,rank:WEEKDAY,allowSimilarRankItems:false,isHolyDayOfObligation:false,isOptional:false,i18nDef:[seasons:christmas_time.octave,{count:7}],seasons:[CHRISTMAS_TIME],periods:[CHRISTMAS_OCTAVE,CHRISTMAS_TO_PRESENTATION_OF_THE_LORD],colors:[WHITE],commonsDef:[],martyrology:[],titles:[],calendar:{weekOfSeason:2,dayOfSeason:7,dayOfWeek:3,nthDayOfWeekInMonth:5,startOfSeason:2025-12-25,endOfSeason:2026-01-11,startOfLiturgicalYear:2025-11-30,endOfLiturgicalYear:2026-11-28,seasons:[CHRISTMAS_TIME]},cycles:{properCycle:PROPER_OF_TIME,sundayCycle:YEAR_A,weekdayCycle:YEAR_2,psalterWeek:WEEK_1},fromCalendarId:ProperOfTime,fromExtendedCalendars:[]}}

Live Test API in Playground

Response Structure

All API responses follow a consistent structure with the following fields:

Field	Type	Description	Example
status	string	Indicates whether the request was successful ("ok") or failed ("error")	ok
error	string \| null	Contains error message if status is "error", otherwise null	null
data	object \| null	Contains the API response data if successful, otherwise null	{...}

Response Data Fields

When the request is successful, the data object contains the following fields:

Field	Type	Sample Value
[ ] Array items:	array[1]	Array of objects
└ id	string	"advent_1_monday"
└ date	string	"2025-12-01"
└ dateDef	object	{...}
└ dateFn	string	"unprivilegedWeekdayOfAdvent"
└ dateArgs	array	[1, ...]
└ yearOffset	number	0
└ dateExceptions	array	[]
└ alternativeTransferDateDefs	array	[]
└ precedence	string	"WEEKDAY_13"
└ rank	string	"WEEKDAY"
└ allowSimilarRankItems	boolean	false
└ isHolyDayOfObligation	boolean	false
└ isOptional	boolean	false
└ i18nDef	array	["seasons:advent.weekday", ...]
└ seasons	array	["ADVENT"]
└ periods	array	[]
└ colors	array	["PURPLE"]
└ commonsDef	array	[]
└ martyrology	array	[]

Headers

Required and optional headers for API requests:

Header Name	Required	Example Value	Description
X-API-Key	Yes	your_api_key_here	Your APIVerve API key. Found in your dashboard under API Keys.
Accept	No	application/json	Specify response format: application/json (default), application/xml, or application/yaml
User-Agent	No	MyApp/1.0	Identifies your application for analytics and debugging purposes
X-Request-ID	No	req_123456789	Custom request identifier for tracking and debugging requests
Cache-Control	No	no-cache	Control caching behavior for the request and response

GraphQL AccessALPHA

Most APIVerve APIs support GraphQL queries, allowing you to combine multiple API calls into a single request and retrieve only the data you need. This powerful feature enables you to orchestrate complex data fetching with precise field selection.

Not all APIs support GraphQL. Check the API schema or test in the GraphQL Explorer to confirm availability for this specific endpoint.

Credit Cost: Each API called in your GraphQL query consumes its standard credit cost.

GraphQL Endpoint

POST https://api.apiverve.com/v1/graphql

GraphQL Query Example

query {
  liturgicalcalendar(
    input: {
      month: "02"
      year: "2025"
    }
  ) {
    2025_12_01
    2025_12_02
    2025_12_03
    2025_12_04
    2025_12_05
    2025_12_06
    2025_12_07
    2025_12_08
    2025_12_09
    2025_12_10
    2025_12_11
    2025_12_12
    2025_12_13
    2025_12_14
    2025_12_15
    2025_12_16
    2025_12_17
    2025_12_18
    2025_12_19
    2025_12_20
    2025_12_21
    2025_12_22
    2025_12_23
    2025_12_24
    2025_12_25
    2025_12_26
    2025_12_27
    2025_12_28
    2025_12_29
    2025_12_30
    2025_12_31
  }
}

Note: Authentication is handled via the x-api-key header in your GraphQL request, not as a query parameter.

Try in GraphQL Explorer GraphQL Documentation

CORS Support

All APIVerve APIs support Cross-Origin Resource Sharing (CORS) with wildcard configuration, allowing you to call the API directly from browser-based applications without proxy servers.

CORS Header	Value	Description
Access-Control-Allow-Origin	*	Accepts requests from any origin
Access-Control-Allow-Methods	*	Accepts any HTTP method
Access-Control-Allow-Headers	*	Accepts any request headers

Browser Usage: You can make direct API calls from JavaScript running in the browser without encountering CORS errors. No additional configuration needed.

Rate Limiting

APIVerve implements rate limiting to ensure fair usage and maintain service quality across all users. Rate limits vary by subscription plan and are applied per API key.

Plan	Rate Limit	Description
Free	5 requests/min	Hard rate limit enforced - exceeding will return 429 errors
Starter	No Limit	Production ready - no rate limiting or throttling
Pro	No Limit	Production ready - no rate limiting or throttling
Mega	No Limit	Production ready - no rate limiting or throttling

Rate Limit Headers

When rate limits apply, each API response includes headers to help you track your usage:

Header	Description
X-RateLimit-Limit	Maximum number of requests allowed per time window
X-RateLimit-Remaining	Number of requests remaining in the current window
X-RateLimit-Reset	Unix timestamp when the rate limit window resets

Handling Rate Limits

Free Plan: When you exceed your rate limit, the API returns a 429 Too Many Requests status code. Your application should implement appropriate backoff logic to handle this gracefully.

Paid Plans: No rate limiting or throttling applied. All paid plans (Starter, Pro, Mega) are production-ready.

Best Practices:

Monitor the rate limit headers to track your usage (Free plan only)
Implement caching where appropriate to reduce API calls
Upgrade to Pro or Mega for guaranteed no-throttle performance

Note: Rate limits are separate from credit consumption. You may have credits remaining but still hit rate limits on Free tier.

Client Libraries

To get started with minimal code, most of our APIs are available through client libraries and clients:

Error Codes

The API uses standard HTTP status codes to indicate success or failure:

Code	Message	Description	Solution
200	OK	Request successful, data returned	No action needed - request was successful
400	Bad Request	Invalid request parameters or malformed request	Check required parameters and ensure values match expected formats
401	Unauthorized	Missing or invalid API key	Include x-api-key header with valid API key from dashboard
403	Forbidden	API key lacks permission or insufficient credits	Check credit balance in dashboard or upgrade plan
429	Too Many Requests	Rate limit exceeded (Free: 5 req/min)	Implement request throttling or upgrade to paid plan
500	Internal Server Error	Server error occurred	Retry request after a few seconds, contact support if persists
503	Service Unavailable	API temporarily unavailable	Wait and retry, check status page for maintenance updates

Need help? Contact support with your X-Request-ID for assistance.

Frequently Asked Questions

How do I get an API key?

Sign up for a free account at dashboard.apiverve.com. Your API key will be automatically generated and available in your dashboard. The free plan includes 1,000 credits plus a 500 credit bonus.

What are credits and how do they work?

Credits are your API usage currency. Each successful API call consumes credits based on the API's complexity. Most APIs cost 1 credit per call, while more complex APIs may cost 2-5 credits. Failed requests and errors don't consume credits. Check the API details above to see the credit cost for this specific API.

Can I use this API in production?

The free plan is for testing and development only. For production use, upgrade to a paid plan (Starter, Pro, or Mega) which includes commercial use rights, no attribution requirements, and guaranteed uptime SLAs. All paid plans are production-ready.

Can I use this API from a browser?

Yes! All APIVerve APIs support CORS with wildcard configuration, so you can call them directly from browser-based JavaScript without needing a proxy server. See the CORS section above for details.

What happens if I exceed my credit limit?

When you reach your monthly credit limit, API requests will return an error until you upgrade your plan or wait for the next billing cycle. You'll receive notifications at 80% and 95% usage to give you time to upgrade if needed.

What's Next?

Continue your journey with these recommended resources

Browse All APIs

Explore our complete catalog of APIs

Authentication Guide

Learn about API keys and security

Rate Limits

Understand usage limits and best practices

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Liturgical Calendar

GET Endpoint

Code Examples

Authentication

Interactive API Playground

Parameters

Response

Example Responses

Response Structure

Response Data Fields

Headers

GraphQL AccessALPHA

CORS Support

Rate Limiting

Rate Limit Headers

Handling Rate Limits

Client Libraries

Error Codes

Frequently Asked Questions

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