[zeveb]

> You could approximate this with Latin characters too, say 2018Y04M05D, but I think there is something to be said for having a distinct ideograph to improve readability and unambiguously mark a day, month, year, hour, minute or second.

Great, now you have n+1 standards …

[SllX]

About 1.5B people give or take already use or are familiar with this standard (Chinese ideographs, not my lame Latin spin on it), so we still only have n standards. This is more about picking one and extending its usage to other locales.

[syrrim]

It already exists:

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