dayjs

Day.js (or dayjs) is a Date library designed to replace Moment.

Get started by installing the package as usual:

npm install dayjs

Use like:

import * as dayjs from 'dayjs';

dayjs().format();

If esModuleInterop and allowSyntheticDefaultImports are true in your TSConfig, then import like:

import dayjs from 'dayjs';

dayjs().format();

Usage

Parsing and formatting a date string:

import dayjs from 'dayjs';

// 01:09:49
dayjs("2025-12-01T01:09:49.667Z").format("HH:mm:ss")

Parsing and formatting a duration:

import dayjs from "dayjs";
import duration from "dayjs/plugin/duration";

dayjs.extend(duration);

dayjs.duration(2_000, "seconds").format("HH:mm:ss")

Logic on dates and times:

import dayjs from "dayjs";
import isSameOrAfter from "dayjs/plugin/isSameOrAfter";

dayjs.extend(isSameOrAfter);

const isEventStarted = dayjs().isSameOrAfter(startDateTime);