30 Open Source Date Time Software Projects

Parse, validate, manipulate, and display dates, time and timezones in Swift

Joda-Time is the widely used replacement for the Java date and time classes prior to Java SE 8.

Building a better date/time library for Swift

Fancy date ranges for Moment.js

Third-party date and time pickers for Android.

Make working with dates in R just that little bit easier

Fast ISO8601 date time parser for Python written in C

An Easy to Use Calendar for iOS (Swift 5.0)

:date: Tiny date, time diff calculator with piggybacked timers

PyTime is an easy-use Python module which aims to operate date/time/datetime by string.

ezTime — pronounced "Easy Time" — is a very easy to use Arduino time and date library that provides NTP network time lookups, extensive timezone support, formatted time and date strings, user events, millisecond precision and more.

Date and time library for PHP

A helping hand for generating sensible data with ScalaCheck

Emacs timestamp and date-time library

Essential light-weight portable C++ 11 library dealing with images/files/systems for researches and demos

:envelope: Learn Network Protocol and Network Programming

Java 8 Date/Time API enhancements for Groovy

An extension for Visual Studio Code that provides a configurable command for inserting the current date and time

[UNMAINTAINED] Wrapper for Material UI Date and Time picker components

Multilingual library to easily parse date strings to java.util.Date objects.

Business time logic for PHP

Light Javascript date and time utilities (formatting, ranges e.t.c)

⌚️ A faster unique() function

Business time / market hours logic for TypeScript

Different approaches to mocking the Date in Jest tests

Efficient Updating of Date-Times

Ruby gem for working with months

The XP Framework is an all-purpose, object oriented PHP framework.

Code for date4j.net's simple date API, with a POM file, for upload to Maven Central.

A natural language date-time parser for the command-line