ISO 8601 and RFC 3339 Dates
Official docs outline
- Internet date/time format
Grammar of full-date, full-time and date-time with offsets.
- Date and time on the internet: timestamps
Ordering, simplicity and recommended restrictions of ISO 8601 subset.
- Local time and offsets
The Z suffix, numeric offsets and the unknown local offset convention.
- Restrictions and leap seconds
Restrictions on the ISO 8601 profile and leap second handling.
- W3C date and time formats
Profile of ISO 8601 used on the web.
- Date and time with time zone names
Internet Extended Date/Time Format adding IANA zone names.
Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.