Business Days Calculator API

API ID 14212

Count working days between two dates or add business days to a date, skipping weekends and public holidays of 100+ countries and regions.

API Documentation

Endpoints

Request
Business days between dates. Count working days between two dates and add/subtract business days, skipping weekends and the public holidays of 100+ countries and regions. Custom weekend days.
Endpoint ID: 35281
GET https://zylalabs.com/api/14212/business+days+calculator+api/35281/business+days+between+dates
INPUT PARAMETERS

Business days between dates — Endpoint Features

Object Description
start Required YYYY-MM-DD
end Required YYYY-MM-DD
country Optional ISO country (optional)
state Optional Region (optional)
weekend Optional Weekend days 0=Sun..6=Sat

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

start
end
country
state
weekend
API EXAMPLE RESPONSE
JSON
{
    "start": "2026-12-01",
    "end": "2026-12-31",
    "calendarDays": 31,
    "businessDays": 21,
    "weekendDays": 8,
    "holidaysOnWeekdays": [
        "2026-12-08",
        "2026-12-25"
    ],
    "country": "ES",
    "note": "Both start and end dates included."
}
Business days between dates — CODE SNIPPETS

curl --location --request GET 'https://zylalabs.com/api/14212/business+days+calculator+api/35281/business+days+between+dates?start=2026-12-01&end=2026-12-31&country=ES&weekend=6,0' --header 'Authorization: Bearer YOUR_API_KEY' 


    
Request
Add business days. Count working days between two dates and add/subtract business days, skipping weekends and the public holidays of 100+ countries and regions. Custom weekend days.
Endpoint ID: 35282
GET https://zylalabs.com/api/14212/business+days+calculator+api/35282/add+business+days
INPUT PARAMETERS

Add business days — Endpoint Features

Object Description
date Required YYYY-MM-DD
days Required Business days (negative to subtract)
country Optional ISO country

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

date
days
country
API EXAMPLE RESPONSE
JSON
{
    "start": "2026-12-23",
    "days": 3,
    "result": "2026-12-29",
    "weekday": "Tuesday",
    "country": "ES",
    "skippedDays": 3
}
Add business days — CODE SNIPPETS

curl --location --request GET 'https://zylalabs.com/api/14212/business+days+calculator+api/35282/add+business+days?date=2026-12-23&days=3&country=ES' --header 'Authorization: Bearer YOUR_API_KEY' 


    

API Access Key & Authentication

After signing up, every developer is assigned a personal API access key, a unique combination of letters and digits provided to access to our API endpoint. To authenticate with the Business Days Calculator API simply include your bearer token in the Authorization header.

Headers
Header Description
Authorization Required Should be Bearer access_key. See "Your API Access Key" above when you are subscribed.

No long-term commitment. Upgrade, downgrade, or cancel anytime. Free Trial includes up to 50 requests.

Starts at
$10,000/Year


  • Custom Volume
  • Custom Rate Limit
  • Specialized Customer Support
  • Real-Time API Monitoring

Overview

Count working days between two dates or add business days to a date, skipping weekends and public holidays of 100+ countries and regions.

Business Days Calculator API FAQs

Each endpoint returns JSON data. The "Business days between dates" endpoint provides the count of calendar days, business days, weekend days, and holidays on weekdays between two dates. The "Add business days" endpoint returns the start date, number of days added, resulting date, and skipped days.

Key fields include "start," "end," "calendarDays," "businessDays," "weekendDays," "holidaysOnWeekdays," "result," "weekday," and "country." These fields provide essential information about the date calculations and the context of the results.

Parameters include "start" and "end" dates for the first endpoint, and "start" date and "days" for the second. Users can also specify the "country" code to account for local public holidays and customize weekend days if needed.

The response data is structured in a JSON format with key-value pairs. Each endpoint's response includes relevant fields that summarize the date calculations, making it easy to parse and utilize in applications.

The data sources include official public holiday calendars and regional guidelines for business days. This ensures that the API accurately reflects the working days and holidays for over 100 countries and regions.

Typical use cases include project management for scheduling tasks, calculating deadlines, and planning events while considering holidays and weekends. Businesses can use this API to ensure compliance with local working days.

Users can utilize the returned data by integrating it into scheduling applications, automating date calculations, and generating reports that require accurate business day assessments. The clear structure allows for easy extraction of relevant information.

If results are partial or empty, users should check the input parameters for accuracy, such as valid date formats and country codes. Implementing error handling in applications can help manage unexpected results and provide user feedback.

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