# date-fns v4.2.0

- Product: date-fns (https://whatsnew.fyi/product/date-fns)
- Vendor: date-fns
- Date: 2026-05-18
- Version: v4.2.0
- Original notes: https://github.com/date-fns/date-fns/releases/tag/v4.2.0
- Permalink: https://whatsnew.fyi/product/date-fns/releases/v4.2.0

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **changed** — Added Temporal API references to the JSDoc annotations of add, addBusinessDays, and addDays

This is a minor release in all senses, it only includes documentation updates (first of many) that points to the new [You Don't Need date-fns\*](https://date-fns.org/you-dont-need-date-fns) page.

\* Not really

###### Changed

- Added Temporal API references to the JSDoc annotations of `add`, `addBusinessDays`, and `addDays`.