date-fns vs Day.js

date-fns vs Day.js
Fact	date-fns	Day.js
Language	TypeScript	JavaScript
Licence	None detected	MIT
Stars	37k	49k
Latest	v4.4.0	v1.11.23
Last push	2026-09-22	2026-09-15
Release cadence	about 4 days between releases	about 78 days between releases
Active contributors	2 commit authors on the default branch in the last 90 days	4 commit authors on the default branch in the last 90 days
Flags	No licence detected	none

How they relate

Both replace Moment.js. Alternatives to Moment.js →
Full replacementdate-fnsPlain functions over native Date, tree-shakable.
Drop-inDay.jsMoment-compatible API in about 2 kB.

v5.0.0-alpha.02026-05-29v5 focuses on reducing the date-fns package size. Compared to v4.3.0, this version reduces the zipped package size from…pre-release
v4.4.02026-05-29This release revisits the approach to CDN usage and introduces a new package, @date-fns/cdn and deprecates the date-fns…
v4.3.02026-05-22Kudos to @ImRodry and @puneetdixit200 for their contributions.
v4.2.12026-05-18Fixed type definitions missing in v4.2.0 due to TypeScript misconfiguration.
v4.2.02026-05-18This is a minor release in all senses, it only includes documentation updates (first of many) that points to the new Yo…

v1.11.232026-08-17plugin: timezone plugin prevent RangeError for invalid Day.js values (#3180) (dad46e6)
v1.11.222026-08-16plugin: timezone compute instance .tz() offset without host DST (#3174) (e27ee80), closes #3169
v1.11.212026-05-26preserve unsupported year tokens in format (#3015) (#3016) (8fda602)
v1.11.202026-03-12Update locale km.js to support meridiem (#3017) (9d2b6a1)
v1.11.192025-10-31added usage warnings for diff + updated unit tests (#2948) (269a7a9)

✓ signed The latest release, v4.4.0, carries a signature GitHub verified.

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unsigned The latest release, v1.11.23, carries no signature GitHub could verify.

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