Date CalculatorDate Calculator API

OnlineCredit Usage:1 per callRefreshed 1 month ago
avg: 281ms|p50: 266ms|p75: 291ms|p90: 321ms|p99: 382ms

Date Calculator is a simple tool for calculating date differences. It returns the calculated date difference based on the dates provided.

The Date Calculator API provides reliable and fast access to date calculator data through a simple REST interface. Built for developers who need consistent, high-quality results with minimal setup time.

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

GET Endpoint

URL
https://api.apiverve.com/v1/datecalculator

Code Examples

Here are examples of how to call the Date Calculator API in different programming languages:

cURL Request
curl -X GET \
  "https://api.apiverve.com/v1/datecalculator?start=2022-01-01&end=2024-08-31" \
  -H "X-API-Key: your_api_key_here"
JavaScript (Fetch API)
const response = await fetch('https://api.apiverve.com/v1/datecalculator?start=2022-01-01&end=2024-08-31', {
  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/datecalculator?start=2022-01-01&end=2024-08-31', 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/datecalculator?start=2022-01-01&end=2024-08-31', 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($ch, CURLOPT_URL, 'https://api.apiverve.com/v1/datecalculator?start=2022-01-01&end=2024-08-31');
curl_setopt($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/datecalculator?start=2022-01-01&end=2024-08-31", 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/datecalculator?start=2022-01-01&end=2024-08-31')
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/datecalculator?start=2022-01-01&end=2024-08-31");
        response.EnsureSuccessStatusCode();

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

Authentication

The Date Calculator API requires authentication via API key. Include your API key in the request header:

Required Header
X-API-Key: your_api_key_here

Learn more about authentication →

Interactive API Playground

Test the Date Calculator API directly in your browser with live requests and responses.

Parameters

The following parameters are available for the Date Calculator API:

Calculate Date Differences

ParameterTypeRequiredDescriptionDefaultExample
startstringrequired
The start date for calculating the difference (format: YYYY-MM-DD)
Format: date (e.g., 2022-01-01)
-2022-01-01
endstringrequired
The end date for calculating the difference (format: YYYY-MM-DD)
Format: date (e.g., 2024-08-31)
-2024-08-31

Response

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

Example Responses

JSON Response
200 OK
{
  "status": "ok",
  "error": null,
  "data": {
    "minutes": 524160,
    "hours": 8736,
    "days": 364,
    "weeks": 52,
    "months": 11,
    "years": 0,
    "start": {
      "date": "2022-01-01",
      "day": "Saturday",
      "month": "January",
      "year": "2022",
      "words": "Saturday, January 1st 2022"
    },
    "end": {
      "date": "2022-12-31",
      "day": "Saturday",
      "month": "December",
      "year": "2022",
      "words": "Saturday, December 31st 2022"
    }
  }
}
XML Response
200 OK
<?xml version="1.0" encoding="UTF-8"?>
<response>
  <status>ok</status>
  <error xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
  <data>
    <minutes>524160</minutes>
    <hours>8736</hours>
    <days>364</days>
    <weeks>52</weeks>
    <months>11</months>
    <years>0</years>
    <start>
      <date>2022-01-01</date>
      <day>Saturday</day>
      <month>January</month>
      <year>2022</year>
      <words>Saturday, January 1st 2022</words>
    </start>
    <end>
      <date>2022-12-31</date>
      <day>Saturday</day>
      <month>December</month>
      <year>2022</year>
      <words>Saturday, December 31st 2022</words>
    </end>
  </data>
</response>
YAML Response
200 OK
status: ok
error: null
data:
  minutes: 524160
  hours: 8736
  days: 364
  weeks: 52
  months: 11
  years: 0
  start:
    date: '2022-01-01'
    day: Saturday
    month: January
    year: '2022'
    words: Saturday, January 1st 2022
  end:
    date: '2022-12-31'
    day: Saturday
    month: December
    year: '2022'
    words: Saturday, December 31st 2022
CSV Response
200 OK
keyvalue
minutes524160
hours8736
days364
weeks52
months11
years0
start{date:2022-01-01,day:Saturday,month:January,year:2022,words:Saturday, January 1st 2022}
end{date:2022-12-31,day:Saturday,month:December,year:2022,words:Saturday, December 31st 2022}

Response Structure

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

FieldTypeDescriptionExample
statusstringIndicates whether the request was successful ("ok") or failed ("error")ok
errorstring | nullContains error message if status is "error", otherwise nullnull
dataobject | nullContains the API response data if successful, otherwise null{...}

Learn more about response formats →

Response Data Fields

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

Response fields marked with Premium are available exclusively on paid plans.View pricing
FieldTypeSample ValueDescription
minutesnumber524160Total number of minutes between start and end dates
hoursnumber8736Total number of hours between start and end dates
daysnumber364Total number of days between start and end dates
weeksnumber52Total number of weeks between start and end dates
monthsnumber11Total number of months between start and end dates
yearsnumber0Total number of years between start and end dates
startobject{...}-
â”” datestring"2022-01-01"Formatted start date in YYYY-MM-DD format
â”” dayPremiumstring"Saturday"Day of week name for the start date
â”” monthPremiumstring"January"Month name for the start date
â”” yearstring"2022"Year for the start date
â”” wordsPremiumstring"Saturday, January 1st 2022"Human-readable formatted start date with day and month
endobject{...}-
â”” datestring"2022-12-31"Formatted end date in YYYY-MM-DD format
â”” dayPremiumstring"Saturday"Day of week name for the end date
â”” monthPremiumstring"December"Month name for the end date
â”” yearstring"2022"Year for the end date
â”” wordsPremiumstring"Saturday, December 31st 2022"Human-readable formatted end date with day and month

Headers

Required and optional headers for Date Calculator API requests:

Header NameRequiredExample ValueDescription
X-API-Keyrequiredyour_api_key_hereYour APIVerve API key. Found in your dashboard under API Keys.
Acceptoptionalapplication/jsonSpecify response format: application/json (default), application/xml, or application/yaml
User-AgentoptionalMyApp/1.0Identifies your application for analytics and debugging purposes
X-Request-IDoptionalreq_123456789Custom request identifier for tracking and debugging requests
Cache-Controloptionalno-cacheControl caching behavior for the request and response

Learn more about request headers →

GraphQL AccessALPHA

Access Date Calculator through GraphQL to combine it with other API calls in a single request. Query only the date calculator data you need with precise field selection, and orchestrate complex data fetching workflows.

Test Date Calculator in the GraphQL Explorer to confirm availability and experiment with queries.

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 {
  datecalculator(
    input: {
      start: "2022-01-01"
      end: "2024-08-31"
    }
  ) {
    minutes
    hours
    days
    weeks
    months
    years
    start {
      date
      day
      month
      year
      words
    }
    end {
      date
      day
      month
      year
      words
    }
  }
}

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

CORS Support

The Date Calculator API supports Cross-Origin Resource Sharing (CORS) with wildcard configuration, allowing you to call Date Calculator directly from browser-based applications without proxy servers.

CORS HeaderValueDescription
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 call Date Calculator directly from JavaScript running in the browser without encountering CORS errors. No proxy server or additional configuration needed.

Learn more about CORS support →

Rate Limiting

Date Calculator API requests are subject to rate limiting based on your subscription plan. These limits ensure fair usage and maintain service quality for all Date Calculator users.

PlanRate LimitDescription
Free5 requests/minHard rate limit enforced - exceeding will return 429 errors
StarterNo LimitProduction ready - standard traffic priority
ProNo LimitProduction ready - preferred traffic priority
MegaNo LimitProduction ready - highest traffic priority

Learn more about rate limiting →

Rate Limit Headers

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

HeaderDescription
X-RateLimit-LimitMaximum number of requests allowed per time window
X-RateLimit-RemainingNumber of requests remaining in the current window
X-RateLimit-ResetUnix timestamp when the rate limit window resets

Handling Rate Limits

Free Plan: When you exceed your rate limit, Date Calculator 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 for Date Calculator:

  • Monitor the rate limit headers to track your Date Calculator usage (Free plan only)
  • Cache date calculator responses where appropriate to reduce API calls
  • Upgrade to Pro or Mega for guaranteed no-throttle Date Calculator performance

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

Error Codes

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

CodeMessageDescriptionSolution
200OKRequest successful, data returnedNo action needed - request was successful
400Bad RequestInvalid request parameters or malformed requestCheck required parameters and ensure values match expected formats
401UnauthorizedMissing or invalid API keyInclude x-api-key header with valid API key from dashboard
403ForbiddenAPI key lacks permission or insufficient creditsCheck credit balance in dashboard or upgrade plan
429Too Many RequestsRate limit exceeded (Free: 5 req/min)Implement request throttling or upgrade to paid plan
500Internal Server ErrorServer error occurredRetry request after a few seconds, contact support if persists
503Service UnavailableAPI temporarily unavailableWait and retry, check status page for maintenance updates

Learn more about error handling →

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

Integrate Date Calculator with SDKs

Get started quickly with official Date Calculator SDKs for your preferred language. Each library handles authentication, request formatting, and error handling automatically.

Available for Node.js, Python, C#/.NET, and Android/Java. All SDKs are open source and regularly updated.

Integrate Date Calculator with No-Code API Tools

Connect the Date Calculator API to your favorite automation platform without writing code. Build workflows that leverage date calculator data across thousands of apps.

All platforms use your same API key to access Date Calculator. Visit our integrations hub for step-by-step setup guides.

Frequently Asked Questions

How do I get an API key for Date Calculator?
Sign up for a free account at dashboard.apiverve.com. Your API key will be automatically generated and available in your dashboard. The same key works for Date Calculator and all other APIVerve APIs. The free plan includes 1,000 credits plus a 500 credit bonus.
How many credits does Date Calculator cost?

Each successful Date Calculator API call consumes credits based on plan tier. Check the pricing section above for the exact credit cost. Failed requests and errors don't consume credits, so you only pay for successful date calculator lookups.

Can I use Date Calculator in production?

The free plan is for testing and development only. For production use of Date Calculator, 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 Date Calculator from a browser?
Yes! The Date Calculator API supports CORS with wildcard configuration, so you can call it directly from browser-based JavaScript without needing a proxy server. See the CORS section above for details.
What happens if I exceed my Date Calculator credit limit?

When you reach your monthly credit limit, Date Calculator 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

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