Edit Libera Date And Buisness Days Calculator API API ID: 11640

Libera.Date.Api is a high-precision date calculation engine designed to streamline business logic for global applications. Its core strength lies in its advanced Working Days System, which accurately calculates business days by automatically excluding weekends and public holidays for multiple countries (including 100 countries). Beyond simple duration checks, the API offers intelligent scheduling tools like finding the nearest available working day, analyzing date ranges for non-working intervals, and distinguishing between standard weekends and legal holidays. Whether you are computing SLAs, planning delivery windows, or building HR rosters, Libera.Date.Api ensures your dates align with real-world business calendars.
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  • 📅 Libera.Date.Api Documentation

    🚀 Why Choose Libera.Date.Api?

    Time is money, but calculating it correctly is harder than it looks. Libera.Date.Api is the ultimate solution for developers building HR systems, logistics platforms, and financial applications.

    Stop wrestling with leap years, timezone anomalies, and shifting public holidays. Powered by the industry-standard NodaTime engine and our proprietary Working Days System, this API delivers:

    • Global Awareness: Built-in support for major economies (US, UK, DE, PL, FR) with accurate holiday calendars.

    • Business Logic Ready: Instantly calculate SLAs and delivery dates by excluding weekends and holidays.

    • Precision Engineering: Get exact durations down to the minute, or broad calendar period differences (Years/Months/Days).

    • Smart Fallbacks: Automatically find the next available working day when deadlines hit a holiday.


    🔐 Authentication

    All requests must be authenticated. You can use either an API Key or a Bearer Token.

    Method Header Name Value Format
    API Key X-Api-Key YOUR_API_KEY
    Bearer Token Authorization Bearer YOUR_JWT_TOKEN

 

 

 


📡 Endpoints Overview

Base URL: http://localhost:8080 (adjust to your deployment)

1. Date Calculator

🔹 Calculate Period Between Dates

Calculates the calendar difference (Years, Months, Days).

  • URL: /date-calculator/period/date

  • Method: GET

  • Parameters:

    • Start (query, required): Start date (ISO 8601, e.g., 2024-01-01)

    • End (query, required): End date (ISO 8601, e.g., 2025-03-15)

Request:

curl -X GET "http://localhost:8080/date-calculator/period/date?Start=2024-01-01&End=2025-03-15" \
    -H "X-Secret: TEST_SECRET"

Response (200 OK):

{
 "years": 1,
 "months": 2,
 "days": 14,
 "description": "1 year, 2 months, 14 days"
}

🔹 Calculate Time Duration

Calculates the duration in total days, hours, and minutes.

  • URL: /date-calculator/period/time

  • Method: GET

  • Parameters:

    • Start (query): 2024-01-01T12:00:00

    • End (query): 2024-01-05T18:30:00

Request:

curl -X GET "<http://localhost:8080/date-calculator/period/time?Start=2024-01-01T12:00:00&End=2024-01-05T18:30:00>" \
    -H "X-Secret: TEST_SECRET"

Response (200 OK):

{
 "totalDays": 4,
 "hours": 102,
 "minutes": 6150
}

 


2. Working Days & Holidays

Advanced logic for business days, weekends, and public holidays.

Path Parameter: {countryCode} (e.g., PL, US, DE, UK).

 

🔹 Check Working Day & Find Nearest

Checks if a specific date is a working day. If it is not (due to weekend or holiday), it returns the date of the next immediate working day.

  • URL: GET /workingdays/{countryCode}/is-working-day

  • Parameters:

    • Date (required, YYYY-MM-DD)

Example Request (Checking Christmas Day in US):

bash
curl -X GET "http://localhost:8080/workingdays/US/is-working-day?Date=2025-12-25"

Response (200 OK):

json{
"date": "2025-12-25T00:00:00",
"isWorkingDay": false,
"nearestWorkingDay": "2025-12-26T00:00:00"
}

🔹 Get Detailed Non-Working Info

Returns detailed metadata about why a day is not a working day. It distinguishes between weekends (specifying if it's the 1st or 2nd day of the weekend) and public holidays.

  • URL: GET /workingdays/{countryCode}/non-working-info

  • Parameters:

    • Date (required, YYYY-MM-DD)

Example Request:

bash
curl -X GET "http://localhost:8080/workingdays/PL/non-working-info?Date=2024-05-01"

Response (200 OK):

json{
"date": "2024-05-01T00:00:00",
"isNonWorkingDay": true,
"type": "holiday",
"weekendDayNumber": null,
"holiday": {
  "englishName": "Labor Day",
  "localName": "Święto Pracy"
}
}

🔹 Analyze Range (Working vs. Non-Working)

Generates a comprehensive breakdown of a date range, splitting all dates into "Working" and "Non-Working" lists. Ideal for rendering calendars or Gantt charts.

  • URL: GET /workingdays/{countryCode}/range

  • Parameters:

    • Start (required): Range start.

    • End (required): Range end.

    • Note: Max range is limited by server configuration (default 366 days).

Example Request:

bash
curl -X GET "http://localhost:8080/workingdays/US/range?Start=2024-07-03&End=2024-07-05"

Response (200 OK):

json{
"start": "2024-07-03T00:00:00",
"end": "2024-07-05T00:00:00",
"workingDays": [
  { "date": "2024-07-03T00:00:00" },
  { "date": "2024-07-05T00:00:00" }
],
"nonWorkingDays": [
  {
    "date": "2024-07-04T00:00:00",
    "type": "holiday",
    "englishName": "Independence Day",
    "localName": "Independence Day"
  }
]
}

🔹 Count Working Days

Calculates the number of business days between two dates. (excluding weekends and holidays).

  • URL: /workingdays/{countryCode}/count

  • Method: GET

  • Parameters:

    • Start (query): 2024-05-01

    • End (query): 2024-05-10

Request:

curl -X GET "<http://localhost:8080/workingdays/PL/count?Start=2024-05-01&End=2024-05-10>" \
    -H "X-Secret: TEST_SECRET"

Response (200 OK):

{
 "totalDays": 366,
 "workingDays": 253
}

🔹 Get Off-Days Count

Returns the count of non-working days (weekends + holidays).

  • URL: /workingdays/{countryCode}/off-days

  • Method: GET

Request:

curl -X GET "<http://localhost:8080/workingdays/PL/off-days?Start=2024-05-01&End=2024-05-10>" \
    -H "X-Secret: TEST_SECRET"

Response (200 OK):

{
 "totalDays": 366,
 "offDays": 113
}

🔹 List Public Holidays

Returns a list of public holidays in the given range.

  • URL: /workingdays/{countryCode}/holidays

  • Method: GET

Request:

curl -X GET "<http://localhost:8080/workingdays/PL/holidays?Start=2024-01-01&End=2024-01-10>" \
    -H "X-Secret: TEST_SECRET"

Response (200 OK):

[
{
   "date": "2024-01-01",
   "name": "New Year's Day",
   "localName": "Nowy Rok"
},
{
   "date": "2024-01-06",
   "name": "Epiphany",
   "localName": "Święto Trzech Króli"
}
]

🔹 Get Weekends Count

Returns the number of weekend days (Saturdays and Sundays).

  • URL: /workingdays/{countryCode}/weekends

  • Method: GET

Request:

curl -X GET "<http://localhost:8080/workingdays/PL/weekends?Start=2024-05-01&End=2024-05-10>" \
    -H "X-Secret: TEST_SECRET"

Response (200 OK):

{
 "totalDays": 91,
 "weekendDaysCount": 26
}

 


API Documentation

Endpoints


Health check Endpoint



                                                                            
GET https://zylalabs.com/api/11640/edit+libera+date+and+buisness+days+calculator+api/21974/health
                                                                            
                                                                        

Free test requests remaining: 3 of 3.

This endpoint does not require any input parameters.


API EXAMPLE RESPONSE

Healthy

Health - CODE SNIPPETS


curl --location --request GET 'https://zylalabs.com/api/11640/edit+libera+date+and+buisness+days+calculator+api/21974/health' --header 'Authorization: Bearer YOUR_API_KEY' 


    

Returns whether given date is a working day. If not, returns the nearest next working day.



                                                                            
GET https://zylalabs.com/api/11640/edit+libera+date+and+buisness+days+calculator+api/21978/is+working+day
                                                                            
                                                                        

Is Working Day - Endpoint Features

Object Description
Date [Required]
countryCode [Required]

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

Date

API EXAMPLE RESPONSE

{"date":"2026-01-06T00:00:00","isWorkingDay":false,"nearestWorkingDay":"2026-01-07T00:00:00"}

Is Working Day - CODE SNIPPETS


curl --location --request GET 'https://zylalabs.com/api/11640/edit+libera+date+and+buisness+days+calculator+api/21978/is+working+day?Date=2026-01-06&countryCode=Required' --header 'Authorization: Bearer YOUR_API_KEY' 


    

Returns the nearest working day on or after the given date.



                                                                            
GET https://zylalabs.com/api/11640/edit+libera+date+and+buisness+days+calculator+api/21981/nearest+working+day
                                                                            
                                                                        

Nearest Working Day - Endpoint Features

Object Description
Date [Required]
countryCode [Required]

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

Date

API EXAMPLE RESPONSE

{"date":"2026-01-06T00:00:00","nearestWorkingDay":"2026-01-07T00:00:00","isSameDay":false}

Nearest Working Day - CODE SNIPPETS


curl --location --request GET 'https://zylalabs.com/api/11640/edit+libera+date+and+buisness+days+calculator+api/21981/nearest+working+day?Date=2026-01-06&countryCode=Required' --header 'Authorization: Bearer YOUR_API_KEY' 


    

Returns whether the day is non-working and explains if it's weekend (1st/2nd day) or a public holiday.



                                                                            
GET https://zylalabs.com/api/11640/edit+libera+date+and+buisness+days+calculator+api/21982/non+working+day+info
                                                                            
                                                                        

Non Working Day Info - Endpoint Features

Object Description
Date [Required]
countryCode [Required]

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

Date

API EXAMPLE RESPONSE

{"date":"2026-01-06T00:00:00","isNonWorkingDay":true,"type":"holiday","weekendDayNumber":null,"holiday":{"englishName":"Epiphany","localName":"Święto Trzech Króli"}}

Non Working Day Info - CODE SNIPPETS


curl --location --request GET 'https://zylalabs.com/api/11640/edit+libera+date+and+buisness+days+calculator+api/21982/non+working+day+info?Date=2026-01-06&countryCode=Required' --header 'Authorization: Bearer YOUR_API_KEY' 


    

Returns workingDays and nonWorkingDays for a date range, limited by appsettings.



                                                                            
GET https://zylalabs.com/api/11640/edit+libera+date+and+buisness+days+calculator+api/21983/workingdays++range
                                                                            
                                                                        

Workingdays Range - Endpoint Features

Object Description
Start [Required]
End [Required]
countryCode [Required]

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

Start
End

API EXAMPLE RESPONSE

{"start":"2026-01-01T00:00:00","end":"2026-01-31T00:00:00","workingDays":[{"date":"2026-01-02T00:00:00"},{"date":"2026-01-05T00:00:00"},{"date":"2026-01-07T00:00:00"},{"date":"2026-01-08T00:00:00"},{"date":"2026-01-09T00:00:00"},{"date":"2026-01-12T00:00:00"},{"date":"2026-01-13T00:00:00"},{"date":"2026-01-14T00:00:00"},{"date":"2026-01-15T00:00:00"},{"date":"2026-01-16T00:00:00"},{"date":"2026-01-19T00:00:00"},{"date":"2026-01-20T00:00:00"},{"date":"2026-01-21T00:00:00"},{"date":"2026-01-22T00:00:00"},{"date":"2026-01-23T00:00:00"},{"date":"2026-01-26T00:00:00"},{"date":"2026-01-27T00:00:00"},{"date":"2026-01-28T00:00:00"},{"date":"2026-01-29T00:00:00"},{"date":"2026-01-30T00:00:00"}],"nonWorkingDays":[{"date":"2026-01-01T00:00:00","type":"holiday","englishName":"New Year's Day","localName":"Nowy Rok"},{"date":"2026-01-03T00:00:00","type":"weekend","weekendDayNumber":1},{"date":"2026-01-04T00:00:00","type":"weekend","weekendDayNumber":2},{"date":"2026-01-06T00:00:00","type":"holiday","englishName":"Epiphany","localName":"Święto Trzech Króli"},{"date":"2026-01-10T00:00:00","type":"weekend","weekendDayNumber":1},{"date":"2026-01-11T00:00:00","type":"weekend","weekendDayNumber":2},{"date":"2026-01-17T00:00:00","type":"weekend","weekendDayNumber":1},{"date":"2026-01-18T00:00:00","type":"weekend","weekendDayNumber":2},{"date":"2026-01-24T00:00:00","type":"weekend","weekendDayNumber":1},{"date":"2026-01-25T00:00:00","type":"weekend","weekendDayNumber":2},{"date":"2026-01-31T00:00:00","type":"weekend","weekendDayNumber":1}]}

Workingdays Range - CODE SNIPPETS


curl --location --request GET 'https://zylalabs.com/api/11640/edit+libera+date+and+buisness+days+calculator+api/21983/workingdays++range?Start=2026-01-01&End=2026-01-31&countryCode=Required' --header 'Authorization: Bearer YOUR_API_KEY' 


    

Calculates the number of business days between two dates. (excluding weekends and holidays)



                                                                            
GET https://zylalabs.com/api/11640/edit+libera+date+and+buisness+days+calculator+api/21973/workingdays+count
                                                                            
                                                                        

Workingdays Count - Endpoint Features

Object Description
Start [Required]
End [Required]
countryCode [Required]

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

Start
End

API EXAMPLE RESPONSE

{"totalDays":366,"workingDays":251}

Workingdays Count - CODE SNIPPETS


curl --location --request GET 'https://zylalabs.com/api/11640/edit+libera+date+and+buisness+days+calculator+api/21973/workingdays+count?Start=2025-01-01&End=2026-01-01&countryCode=Required' --header 'Authorization: Bearer YOUR_API_KEY' 


    

Returns the number of non-working days (weekends + holidays) in the given range.



                                                                            
GET https://zylalabs.com/api/11640/edit+libera+date+and+buisness+days+calculator+api/21975/off-days
                                                                            
                                                                        

off-days - Endpoint Features

Object Description
Start [Required]
End [Required]
countryCode [Required]

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

Start
End

API EXAMPLE RESPONSE

{"totalDays":366,"offDays":115}

Off-days - CODE SNIPPETS


curl --location --request GET 'https://zylalabs.com/api/11640/edit+libera+date+and+buisness+days+calculator+api/21975/off-days?Start=2025-01-01&End=2026-01-01&countryCode=Required' --header 'Authorization: Bearer YOUR_API_KEY' 


    

Returns the number of weekend days (e.g., Saturday and Sunday) in the given range.



                                                                            
GET https://zylalabs.com/api/11640/edit+libera+date+and+buisness+days+calculator+api/21976/weekend+count
                                                                            
                                                                        

Weekend Count - Endpoint Features

Object Description
Start [Required]
End [Required]
countryCode [Required]

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

Start
End

API EXAMPLE RESPONSE

{"totalDays":366,"weekendDaysCount":104}

Weekend Count - CODE SNIPPETS


curl --location --request GET 'https://zylalabs.com/api/11640/edit+libera+date+and+buisness+days+calculator+api/21976/weekend+count?Start=2025-01-01&End=2026-01-01&countryCode=Required' --header 'Authorization: Bearer YOUR_API_KEY' 


    

Returns a list of all public holidays within the specified date range for the given country.



                                                                            
GET https://zylalabs.com/api/11640/edit+libera+date+and+buisness+days+calculator+api/21977/public+holidays
                                                                            
                                                                        

Public holidays - Endpoint Features

Object Description
Start [Required]
End [Required]
countryCode [Required]

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

Start
End

API EXAMPLE RESPONSE

{"count":15,"holidays":[{"date":"2025-01-01T00:00:00","englishName":"New Year's Day","localName":"Nowy Rok"},{"date":"2025-01-06T00:00:00","englishName":"Epiphany","localName":"Święto Trzech Króli"},{"date":"2025-04-20T00:00:00","englishName":"Easter Sunday","localName":"Wielkanoc"},{"date":"2025-04-21T00:00:00","englishName":"Easter Monday","localName":"Drugi Dzień Wielkanocy"},{"date":"2025-05-01T00:00:00","englishName":"May Day","localName":"Święto Pracy"},{"date":"2025-05-03T00:00:00","englishName":"Constitution Day","localName":"Święto Narodowe Trzeciego Maja"},{"date":"2025-06-08T00:00:00","englishName":"Pentecost","localName":"Zielone Świątki"},{"date":"2025-06-19T00:00:00","englishName":"Corpus Christi","localName":"Boże Ciało"},{"date":"2025-08-15T00:00:00","englishName":"Assumption Day","localName":"Wniebowzięcie Najświętszej Maryi Panny"},{"date":"2025-11-01T00:00:00","englishName":"All Saints' Day","localName":"Wszystkich Świętych"},{"date":"2025-11-11T00:00:00","englishName":"Independence Day","localName":"Narodowe Święto Niepodległości"},{"date":"2025-12-24T00:00:00","englishName":"Christmas Eve","localName":"Wolna Wigilia"},{"date":"2025-12-25T00:00:00","englishName":"Christmas Day","localName":"Boże Narodzenie"},{"date":"2025-12-26T00:00:00","englishName":"St. Stephen's Day","localName":"Drugi Dzień Bożego Narodzenia"},{"date":"2026-01-01T00:00:00","englishName":"New Year's Day","localName":"Nowy Rok"}]}

Public holidays - CODE SNIPPETS


curl --location --request GET 'https://zylalabs.com/api/11640/edit+libera+date+and+buisness+days+calculator+api/21977/public+holidays?Start=2025-01-01&End=2026-01-01&countryCode=Required' --header 'Authorization: Bearer YOUR_API_KEY' 


    

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

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Edit Libera Date And Buisness Days Calculator API FAQs

Each endpoint returns JSON data tailored to specific date calculations. For example, the "Count Working Days" endpoint returns the total number of business days between two dates, while the "List Public Holidays" endpoint provides details about holidays within a specified range.

Key fields vary by endpoint. For instance, the "Get Off-Days Count" endpoint returns "totalDays" and "offDays," while "Get Detailed Non-Working Info" includes "date," "isNonWorkingDay," and "holiday" details like "englishName" and "localName."

Parameters differ by endpoint. For example, the "Check Working Day" endpoint requires a "Date" parameter, while the "Analyze Range" endpoint needs "Start" and "End" dates. Each parameter must follow specific formats, such as YYYY-MM-DD for dates.

Response data is structured in JSON format, typically containing a main object with relevant fields. For example, the "Analyze Range" endpoint returns "workingDays" and "nonWorkingDays" as arrays of date objects, making it easy to parse and utilize.

The API utilizes the industry-standard NodaTime engine and proprietary algorithms to ensure accurate date calculations. Data for public holidays and weekends is sourced from reliable national calendars for over 100 countries.

Common use cases include calculating SLAs, planning delivery schedules, and managing HR rosters. For instance, businesses can use the "Count Working Days" endpoint to determine deadlines while accounting for holidays and weekends.

Users can customize requests by specifying parameters like date ranges and country codes. For example, when using the "List Public Holidays" endpoint, users can define the "Start" and "End" dates to retrieve holidays relevant to their specific timeframe.

Users can leverage the structured JSON responses to integrate date calculations into applications. For example, the "Get Weekends Count" response can be used to adjust project timelines by accounting for non-working days in scheduling software.

The "Get Off-Days Count" endpoint provides the total number of non-working days within a specified date range, including both weekends and public holidays. This helps businesses understand potential downtime during a given period.

You can use the "Check Working Day & Find Nearest" endpoint. By providing a date, the API will return whether it's a working day and, if not, the nearest subsequent working day, allowing for effective scheduling.

The "Analyze Range" endpoint allows you to analyze a maximum date range of 366 days, as configured by the server settings. This is useful for generating comprehensive working and non-working day lists over a year.

The API includes built-in support for over 100 countries, utilizing reliable national calendars to accurately reflect public holidays. This ensures that calculations for business days are precise and relevant to the specified country.

The response includes fields such as "date," "isWorkingDay" (boolean), and "nearestWorkingDay" (date). This structure allows users to quickly assess the status of a date and plan accordingly.

Use the "List Public Holidays" endpoint by specifying the country code and the desired date range. The response will include an array of holidays, detailing each holiday's date and name, which is essential for planning around non-working days.

This endpoint returns detailed metadata about why a specific date is non-working, including whether it's a weekend or a public holiday, along with the holiday's name in both English and the local language, enhancing clarity for users.

The "Count Working Days" endpoint returns the total number of business days between two dates, excluding weekends and holidays. This data can be used to set realistic deadlines and manage project timelines effectively.

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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.

The 'X-Zyla-RateLimit-Reset' header shows the number of seconds until your rate limit resets. This tells you when your request count will start fresh. For example, if it displays 3,600, it means 3,600 seconds are left until the limit resets.

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.

After 7 days, you will be charged the full amount for the plan you were subscribed to during the trial. Therefore, it's important to cancel before the trial period ends. Refund requests for forgetting to cancel on time are not accepted.
When you subscribe to an API free trial, you can make up to 50 API calls. If you wish to make additional API calls beyond this limit, the API will prompt you to perform an "Start Your Paid Plan." You can find the "Start Your Paid Plan" button in your profile under Subscription -> Choose the API you are subscribed to -> Pricing tab.
You can contact us through our chat channel to receive immediate assistance. We are always online from 8 am to 5 pm (EST). If you reach us after that time, we will get back to you as soon as possible. Additionally, you can contact us via email at [email protected]

Please have a look at our Refund Policy: https://zylalabs.com/terms#refund


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