I built date-light: a tiny zero-dependency date utility for JavaScript

#javascript #typescript #opensource

I built date-light, a small zero-dependency date utility library for JavaScript and TypeScript.

I wanted something focused on the common date operations I use most often: formatting, parsing, date math, comparisons, and start/end helpers, without pulling in a larger date library for simple use cases.

What it includes

39 date utility functions
Zero runtime dependencies
TypeScript types
ESM and CommonJS builds
date-fns-style format tokens
A docs/playground site for quickly trying the API

Playground

You can try it here:

https://date-light.flyingsquirrel.me/?v=20260607

Install

npm install date-light

It also works with:

yarn add date-light
pnpm add date-light
bun add date-light

Example

import { format, addDays, differenceInDays } from "date-light";

const today = new Date("2026-06-07T10:30:00");

console.log(format(today, "yyyy-MM-dd"));
console.log(format(addDays(today, 7), "yyyy-MM-dd"));
console.log(differenceInDays(new Date("2026-06-14"), today));