1378
measuring rule
(lemmy.blahaj.zone)
Be sure to follow the rule before you head out.
Rule: You must post before you leave.
Not necessarily. Size of time unit doesn't explicitly mean largest to smallest. For human comprehension day first makes sense because that's the most significant piece of data usually. Likewise for time of day the hour is the most significant piece of data.
Though for computer comprehension, absolutely yyyy/mm/dd is best hands down.