⏰ Day.js 2kB immutable date-time 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

🏹 Better dates & times for Python

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

Python datetimes made easy

A simple, semantic and developer-friendly time package for golang

Now is a time toolkit for golang

Build Time Analyzer for Swift

📅 Easy!Appointments - Self Hosted Appointment Scheduler

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

Date and time library for Rust

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.

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

A React-Native datetime-picker for Android and iOS

BRPickerView 封装的是iOS中常用的选择器组件，主要包括：日期选择器（支持年月日、年月等15种日期样式选择，支持设置星期、至今等）、地址选择器（支持省市区、省市、省三种地区选择）、自定义字符串选择器（支持单列、多列、二级联动、三级联动选择）。支持自定义主题样式，适配深色模式，支持将选择器组件添加到指定容器视图。

ElevenClock: Customize Windows 11 taskbar clock