https://xkcd.com/1179/
xkcd: ISO 8601
iso 8601xkcd
https://www.iso.org/standard/40874.html
ISO 8601:2004 - Data elements and interchange formats — Information interchange — Representation of...
Data elements and interchange formats — Information interchange — Representation of dates and times
iso 8601dataelementsinterchangeformats
https://en.wikipedia.org/wiki/ISO_2711
ISO 8601 - Wikipedia
iso 8601wikipedia
https://www.iso.org/iso-8601-date-and-time-format.html
ISO - ISO 8601 — Date and time format
ISO 8601 is the internationally accepted way to represent dates and times.
date and timeiso 8601format