# fullcalendar v6.1.18

- Product: fullcalendar (https://whatsnew.fyi/product/fullcalendar)
- Vendor: fullcalendar
- Date: 2025-06-30
- Version: v6.1.18
- Original notes: https://github.com/fullcalendar/fullcalendar/releases/tag/v6.1.18
- Permalink: https://whatsnew.fyi/product/fullcalendar/releases/v6.1.18

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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- **fixed** — Optimize custom content-injection rerendering performance, especially important for event rerendering with eventContent

- fix: Optimize custom content-injection rerendering performance (#3003, #7650)
  (Especially important for event rerendering with `eventContent`)