Yup as far as the folder taxonomy thing ISO YYYYMM works fine too

Alphadec is just a timezone free UTC encoding that works down the millisecond so I also use it for snapshots eg

  myscript.py.backup.2026_P5G6_328054_Aug06.txt

So then when I'm doing multiple revisions I don't have to worry about which revision of 20260806's day it was etc. Unix time in ms would work too but Alphadec is a little bit nicer to me than saying myscript.py.backup.1786086462604.txt