⏰ Day.js 2KB immutable date library alternative to Moment.js with the same modern API

⏳ Modern JavaScript date utility library ⌛️

A Fast, Extensible Progress Bar for Python and CLI

😱 Falsehoods Programmers Believe in

The mobile-friendly, responsive, and lightweight jQuery date & time input picker.

Better dates & times for Python

Python datetimes made easy

🕗 The original jQuery plugin that makes it easy to support automatically updating fuzzy timestamps (e.g. "4 minutes ago").

Build Time Analyzer for Swift

Collection of advice on optimizing compile times of Swift projects.

Datetimes for Humans™

A gem providing "time travel", "time freezing", and "time acceleration" capabilities, making it simple to test time-dependent code. It provides a unified method to mock Time.now, Date.today, and DateTime.now in a single call.

Now is a time toolkit for golang

scheduler for Ruby (at, in, cron and every jobs)

A React-Native datetime-picker for Android and iOS

Building a better date/time library for Swift

A date and time library based on the C++11/14/17 <chrono> header

Delorean: Time Travel Made Easy

Fancy date ranges for Moment.js

📅 Easy!Appointments - Open Source Appointment Scheduler

Useful extensions to the standard Python datetime features

Date and time library for Rust

⏰ A straightforward date and time formatter in <1kb

Distributed Tracing, Metrics and Context Propagation for application running on the JVM

🕑 Immutable date and time library for javascript

361000 becomes "6 minutes, 1 second"

A standalone DateTime library originally based off of Carbon

A natural language date/time parser with pluggable rules

GoLang Parse many date strings without knowing format in advance.

Android NTP time library. Get the true current time impervious to device clock time changes