I like that, and if day of week is relevant: 20230915sepFRI Or for a legibility/size tradeoff: 2023.09.15.sep.fri All that left is adding the Chines

I like that, and if day of week is relevant: 20230915sepFRI Or for a legibility/size tradeoff: 2023.09.15.sep.fri All that left is adding the Chinese zodiac year! 2023.09.05.rab.sep.fri Now I am just slightly bothered that the abbreviated words don’t form an isomorphic representation to the numeric. :( 2023.09.05.3watrab.sep.3fri There! 3rd Friday in September, 3rd Water Hare from the first in 1903! :) (In the US we could name years in the form: 4th year of Roosevelt, etc.)