{
"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."
}
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'
{
"start": "2026-12-23",
"days": 3,
"result": "2026-12-29",
"weekday": "Tuesday",
"country": "ES",
"skippedDays": 3
}
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'
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.
| 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.
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.
To obtain your API key, first sign in to your account and navigate to the API you want to use. From the API's Pricing section, choose a plan and complete the subscription process. Once subscribed, return to the API page and you will see your API Access Key displayed at the top of the documentation page. You can use this key to authenticate your requests.
You can’t switch APIs during the free trial. If you subscribe to a different API, your trial will end and the new subscription will start as a paid plan.
The free trial lasts for 7 days and allows you to make up to 50 API requests.
No, the free trial is available only once, so we recommend using it on the API that interests you the most. Most of our APIs offer a free trial, but some may not include this option.
Yes. If the API offers a free trial, you will see a "Free 7-Day Trial" option in its Pricing section. The trial lasts for 7 days and allows up to 50 API requests, enabling you to evaluate the API before subscribing to a paid plan.
Zyla API Hub is like a big store for APIs, where you can find thousands of them all in one place. We also offer dedicated support and real-time monitoring of all APIs. Once you sign up, you can pick and choose which APIs you want to use. Just remember, each API needs its own subscription. But if you subscribe to multiple ones, you'll use the same key for all of them, making things easier for you.
You can monitor your API usage through the response headers included with every request:
x-zyla-api-calls-monthly-used: Shows the total number of API requests you have used during the current billing period.
x-zyla-api-calls-monthly-remaining: Shows the number of API requests you have remaining for the current billing period.
Yes, you can cancel your subscription at any time. Simply go to the Pricing section of the API you're subscribed to and click the "Unsubscribe" button.
Please note that upgrades, downgrades, and cancellations take effect immediately. Once your subscription is canceled, access to the service will end immediately, regardless of any remaining API calls in your quota.
Please have a look at our Refund Policy: https://zylalabs.com/terms#refund