Modern JavaScript date utility library

date-fns provides the most comprehensive, yet simple and consistent toolset for manipulating JavaScript dates in a browser & Node.js.

• date-fns @ GitHub.

A lightweight date picker built with web components that can be used anywhere.

Parse, validate, manipulate,
and display dates and times in JavaScript

A utility package for guessing date's format

A powerful, modern, and friendly wrapper for JavaScript dates and times.
DateTimes, Durations, and Intervals. Immutable, chainable, unambiguous API.
Native time zone and Intl support (no locale or tz files).

Day.js is a minimalist JavaScript library that parses, validates, manipulates, and displays dates and times for modern browsers with a largely Moment.js-compatible API.
If you use Moment.js, you already know how to use Day.js.

Simple and powerful date picker widget for jQuery