No it's not valid ISO8601
ISO8601 has multiple valid representations
that is true, for example
Basic format: YYYYMMDD Example: 19850412
Extended format: YYYY-MM-DD Example: 1985-04-12
Martin Dørum mortie
mortie
/ gist:b10cba988daf37236b4db34b8d307951
Created
August 22, 2020 18:08
— forked from divinity76/gist:34d3f26cebaa5dcfd51a897bd546710b
ISO8601 lolphp