Simon Willison’s Weblog

6th April 2009 - Link Blog

Making the HTML5 time element safe for historians. PPK presents a detailed history of dates and calendars and points out that the HTML5 time element is ill prepared to faithfully represent the kind of dates historians are interested in.

Posted 6th April 2009 at 2:01 pm

Recent articles

OpenAI DevDay 2026 live blog - 29th September 2026
2026 in LLMs (so far) - 27th September 2026
Claude Opus 5.5, GPT-6 Sol, GPT-6 Luna, and a new price war - 22nd September 2026

This is a link post by Simon Willison, posted on 6th April 2009.

calendars 5 dates 6 datetime 8 historians 2 history 41 html5 84 ppk 6 standards 34 time 3

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe