# date-fns v5.0.0-alpha.0

- Product: date-fns (https://whatsnew.fyi/product/date-fns)
- Vendor: date-fns
- Date: 2026-05-29
- Version: v5.0.0-alpha.0
- Original notes: https://github.com/date-fns/date-fns/releases/tag/v5.0.0-alpha.0
- Permalink: https://whatsnew.fyi/product/date-fns/releases/v5.0.0-alpha.0
- Labels: Pre-release

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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- **removed** — Remove CDN scripts from the date-fns package and move them to the separate @date-fns/cdn package
- **changed** — Reduce zipped package size from 5.83 MB to 2.89 MB

v5 focuses on reducing the date-fns package size. Compared to v4.3.0, this version reduces the zipped package size from `5.83 MB` down to `2.89 MB`.

It removes the CDN scripts from the `date-fns` package and moves them to a separate `@date-fns/cdn` package.

It is just the first step in optimizing the package size. Expect further size reduction in the future versions.

###### Changed

- **BREAKING**: The CDN scripts are now available via the `@date-fns/cdn` npm package instead of `date-fns`. Users relying on the latest CDN version (e.g., `https://cdn.jsdelivr.net/npm/date-fns/cdn.min.js`) would be served a polyfill that inserts a script with the correct URL (`https://cdn.jsdelivr.net/npm/@date-fns/cdn/cdn.min.js`) into the page.