datetime

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

lightweight, powerful javascript datetimepicker with no dependencies

⏱ A library for working with dates and times in JS

全龄段友好的C#万能工具库，码数吐司库，包含一些常用的操作类，大都是静态类，加密解密，反射操作，权重随机筛选算法，分布式短id，表达式树，linq扩展，文件压缩，多线程下载，硬件信息，字符串扩展方法，日期时间扩展操作，中国农历，大文件拷贝，图像裁剪，验证码，断点续传，集合扩展、Excel导出等常用封装。诸多功能集一身，代码量不到2MB！

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

libfaketime modifies the system time for a single application

A datetime library for Rust that encourages you to jump into the pit of success.

KotlinX multiplatform date/time library

Robust and type-safe date and time calculations for Swift

Jiffy is a Flutter (Android, IOS and Web) date time package for parsing, manipulating, querying and formatting dates

⏰ Type-safe DateTime and Duration calculations, powered by extensions.