Libraries tagged by Date Calculation

Utility for finding differences in configuration files

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PHP Converter between Star Trek's stardates and real date/time expressions.

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A Vite + React crypto calculator web app powered by on-chain data from Cryptonary

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Adds a panel pricing calculator with a front end module for users and a back end system for managing the data.

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An exchange rate calculator for the `PHP` library [Bryn](ben-gibson/bryn) that pulls data from the European Central Bank.

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Due date calculator written in PHP

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An exchange rate calculator that defers calculation to its registered calculators in priority order until an exchange rate is successfully returned.

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Julian Day Calculator converts between Gregorian calendar dates and Julian Day Numbers (JDN). Julian Day is a continuous count of days used in astronomy and historical research.

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Interval calculator to help sum up multiple time intervals and display the total elapsed days/hours/minutes/seconds

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A PHP library for integrating with the VAT Sense API in WordPress, providing VAT validation, tax rate information, and currency conversion. Features WordPress transient caching and WP_Error support.

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Menstrual Cycle Calculator predicts future menstrual cycles, fertile windows, and ovulation dates based on cycle history and patterns.

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Daylight Duration Calculator computes sunrise, sunset times, and total daylight hours for any geographic location and date using astronomical algorithms.

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Generate professional PDF payslips using salary data from dgtlinf/salary-calculator.

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Framework-agnostic tax calculation engine with multi-jurisdiction support, temporal rate resolution, hierarchical tax structure, reverse charge mechanism, economic nexus determination, partial exemptions, and place-of-supply rules for cross-border services

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A PHP library for calculating monetary conversions. This repository contains the interfaces and domain models only.

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