olemus
kuupäeva ja kellaaja vormingu standard
= the standard that specifies the internationally accepted way to represent dates and times

ülevaateid
https://www.ionos.com/digitalguide/websites/web-development/iso-8601/

https://slidetodoc.com/understanding-iso-8601-date-and-time-representation-formats/

https://en.wikipedia.org/wiki/ISO_8601

https://www.limswiki.org/index.php/Journal:The_problem_with_dates:_Applying_ISO_8601_to_research_data_management

https://pocoproject.org/slides/070-DateAndTime.pdf

https://www.utctime.net/

standardi osad
8601-1: Põhireeglid
https://www.iso.org/obp/ui#iso:std:iso:8601:-1:dis:ed-1:v1:en
8601-2: Laiendused
https://www.iso.org/obp/ui#iso:std:iso:8601:-2:dis:ed-1:v1:en