People. Fellow programmers. If you are going to represent a date as something other than milliseconds since the epoch, please for pete's sake choose a representation where the ascii lexical sorting also matches sorting by time.

year - month - day - hours - minutes -seconds

Programmers who do otherwise will be forced to attend my re-education camp, where we will also discuss such topics as "use milliseconds since the epoch" and “there is only UTC”.

The principle for string key design: order the segments with most general on the left -> most specific on the right. Military list style.