you should never make the assumption that software you use is smart, or even not complete garbage

…and file managers aren’t the only things that display lists of files. low-level tooling should not be “smart” beyond the most basic sorting without specifically being told first

...And you assume you will only ever look at those files with that file manager forever...

There is no downside to writing the leading zeroes pretty much anywhere except when aesthetics matter (event flyers, etc)

i reckon Y might be something like years since 1970 or some other epoch (we do things like week number of the year, day number of the year, etc so i think that’s kinda similar)