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.

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

ReScript is the language for folks who don't necessarily love JavaScript, but who still acknowledge its importance. ReScript looks like JavaScript, works like JavaScript, works with JavaScript, and compiles to the highest quality of clean, readable and performant JavaScript, directly runnable in the browser and Node.js.