For many years now I have maintained a long list of bookmarks to comic strips and other serials. Because I like to read earliest first, rather than follow any one title through its whole archive, I named the bookmarks with dates in the format 26430: two bytes for a year, one for a month (a b c for October November December), and two for a day.
(I know what you’re thinking. For dates before Y2K, I replace the leftmost digit with some character that sorts appropriately.)
The latest version of Firefox interprets leading digits as numbers rather than as characters, so that 25c31 precedes 00101. Dammit. I’ll have to rename them all.
Perhaps a space between year and month will do the trick;
25 930ought to sort before25 a01.