I scanned through this and my takeaway is that it's just defining a formal grammar for iso 8601. Did I miss anything important?
Kind of. As I understand it, ISO-8601 is also super broad and allows for a bunch of different potential formats and I think durations.
For instance, 2009-W01-1 is a valid ISO-8601 date, meaning 2008-12-31(!) which is pretty weird.
2009-W01-1
2008-12-31
I scanned through this and my takeaway is that it's just defining a formal grammar for iso 8601. Did I miss anything important?
Kind of. As I understand it, ISO-8601 is also super broad and allows for a bunch of different potential formats and I think durations.
For instance,
2009-W01-1
is a valid ISO-8601 date, meaning2008-12-31
(!) which is pretty weird.