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Best day of the week APIs

Holiday Calendar API

News & Events

Access accurate public holiday data by country and year, including local names, holiday types, dates, regional coverage, and observance details.

Free 7-Day Trial

100% uptime 27ms avg MCP ready

Edit Libera Date And Buisness Days Calculator API

Tools & Utilities

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.

Free 7-Day Trial

100% uptime 299ms avg MCP ready

Business-Day API

Tools & Utilities

Accurate business-day, holiday, and scheduling math for major countries and their subdivisions — without maintaining a single holiday calendar yourself. Add or subtract working days, check if a date is a business day, find the next valid date, or count working days between two dates, with full support for regional subdivisions, custom weekends, and your own blackout dates. One simple GET call, instant JSON.

Free 7-Day Trial

100% uptime 203ms avg MCP ready

Smart Libera Date And Business Days Calculator API

Tools & Utilities

Enhance your scheduling with the Smart API, designed to simplify date and business day calculations with intelligence.

Free 7-Day Trial

100% uptime 270ms avg MCP ready

Reliable Libera Date And Business Days Calculator API

Tools & Utilities

Trust our Reliable API for consistent date and business day calculations, ensuring you never miss a deadline again.

Free 7-Day Trial

100% uptime 353ms avg MCP ready

Global Libera Date And Business Days Calculator API

Tools & Utilities

The Global API delivers seamless date and business day calculations worldwide, catering to international business needs.

Free 7-Day Trial

100% uptime 434ms avg MCP ready

Global Holidays and Business Days API

Tools & Utilities

Look up public holidays for 55 countries, calculate business day deadlines, find the next business day, export holidays to iCal, and more — all backed by versioned JSON data with no external dependencies at runtime. Covers 55 countries across Africa, Americas, Asia, Europe and Oceania for years 2024 to 2027.

Free 7-Day Trial

100% uptime 114ms avg MCP ready

Accurate Libera Date And Business Days Calculator API

Tools & Utilities

Get precise results every time with our Accurate API for calculating dates and business days—perfect for business professionals.

Free 7-Day Trial

100% uptime 454ms avg MCP ready

Horoscope Today API

Market Data & Trading

Horoscope Today API provides personalized daily predictions based on zodiac signs and weekdays, offering insights into emotions, energy, and decision-making guidance.

Free 7-Day Trial

100% uptime 121ms avg MCP ready

Horoscope Daily API

Market Data & Trading

Interact with celestial knowledge through Horoscope Daily API for spiritual and practical direction.

Free 7-Day Trial

100% uptime 257ms avg MCP ready

World Time API

Tools & Utilities

Embark on a temporal journey with the World Time API – your global clock for instant access to the current date and time in any city. Seamlessly integrating with applications, this API synchronizes the world, ensuring users stay connected to the heartbeat of time across diverse corners of the globe.

Free 7-Day Trial

100% uptime 571ms avg MCP ready

Pregnancy Due Date - Gestational Age API

Health & Fitness

Pregnancy due date and gestational age API. EDD from LMP, conception, IVF transfer day, or ultrasound CRL. ACOG redating rules, trimester, and term milestones. Deterministic ISO 8601 dates.

Free 7-Day Trial

100% uptime 809ms avg MCP ready

Weekly BYDAY Recurrence RRULE API

Tools & Utilities

Schedule weekly events with precision using the Weekly BYDAY Recurrence Weekly BYDAY Recurrence RRULE API.

100% uptime MCP ready

Business-Day and SLA Calculator API

Tools & Utilities

Calculates business days, SLA due dates, holiday-aware deadlines, skipped weekends and holidays, business hours, and business-time durations.

Free 7-Day Trial

100% uptime 3,016ms avg MCP ready

Gestational Age Calculator and Week Conversion API

Health & Fitness

Gestational age at any given date, returned as a 29w2d label and as total days.

Free 7-Day Trial

100% uptime MCP ready

Antenatal Visit Schedule Dates API

Health & Fitness

Antenatal visit dates from the WHO 2016, NICE or ACOG published schedules, as calendar dates.

Free 7-Day Trial

100% uptime MCP ready

IVF Transfer Due Date Calculation API

Health & Fitness

Due date from embryo transfer date. Day-3, day-5, day-6 and egg retrieval calculated separately.

Free 7-Day Trial

100% uptime MCP ready

ACOG Ultrasound Redating Rules API

Health & Fitness

Applies ACOG Committee Opinion 700 Table 1 to decide whether an ultrasound overrides LMP dating.

Free 7-Day Trial

100% uptime MCP ready

Ovulation Date and Fertile Window Calculation API

Health & Fitness

Ovulation estimate and 6-day fertile window from cycle length. Not contraceptive guidance.

Free 7-Day Trial

100% uptime MCP ready

LMP Based Due Date Calculation API

Health & Fitness

Due date from last menstrual period using Naegele's rule, with 21-45 day cycle length correction.

Free 7-Day Trial

100% uptime MCP ready

Pregnancy Trimester and Term Milestones API

Health & Fitness

Trimester boundaries, 24w0d viability, and four preterm and four term classes with their dates.

Free 7-Day Trial

100% uptime MCP ready

Ultrasound Dating Based on Fetal Biometry API

Health & Fitness

Dating from BPD, HC, AC and FL measurements in millimetres, using Hadlock 1984 equations.

Free 7-Day Trial

100% uptime MCP ready

Conception Date from LMP Calculation API

Health & Fitness

Conception date from a last menstrual period or from a known due date, as ISO 8601 dates

Free 7-Day Trial

100% uptime MCP ready

Business Days Calculator and Global Holidays API

Tools & Utilities

Calculate business days accurately while accessing global holiday data to optimize your workflows.

Free 7-Day Trial

100% uptime MCP ready

SLA Deadline Calculator Global Holidays API

Tools & Utilities

Ensure timely project deliveries with the SLA Deadline Calculator, using global holidays for precise deadline calculations.

Free 7-Day Trial

100% uptime MCP ready

horoscope astrology Event Management Recurring Events Time Weekly Recurrence Regional Support Yearly Calendar Global Coverage Workflow Optimization Date Management Regional Coverage Global Clock ACOG Redating day of the week Due Date Calculation Gestational Age Trimester Milestones IVF Tracking Ultrasound Measurement More...

Categories

Tags

Best day of the week APIs

Holiday Calendar API

Edit Libera Date And Buisness Days Calculator API

Business-Day API

Smart Libera Date And Business Days Calculator API

Reliable Libera Date And Business Days Calculator API

Global Libera Date And Business Days Calculator API

Global Holidays and Business Days API

Accurate Libera Date And Business Days Calculator API

Horoscope Today API

Horoscope Daily API

World Time API

Pregnancy Due Date - Gestational Age API

Weekly BYDAY Recurrence RRULE API

Business-Day and SLA Calculator API

Gestational Age Calculator and Week Conversion API

Antenatal Visit Schedule Dates API

IVF Transfer Due Date Calculation API

ACOG Ultrasound Redating Rules API

Ovulation Date and Fertile Window Calculation API

LMP Based Due Date Calculation API

Pregnancy Trimester and Term Milestones API

Ultrasound Dating Based on Fetal Biometry API

Conception Date from LMP Calculation API

Business Days Calculator and Global Holidays API

SLA Deadline Calculator Global Holidays API

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