Where does “post-midnight” come from?

post-midnight (English) comes from English midnight, from Middle English midnight, from Old English midniht, from Proto-Germanic midjanahts, from Proto-Germanic midjaz, from Proto-Indo-European médʰyos, from Proto-Indo-European medʰi-, from Proto-Indo-European me — in the middle of, near, by, around, with.

Ancestry of “post-midnight”, step by step

StepLanguageWordMeaning
1EnglishmidnightThe middle of the night: the sixth temporal hour,...
2Middle Englishmidnight
3Old Englishmidnihtmidnight
4Proto-Germanicmidjanahtsmidnight
5Proto-Germanicmidjazmiddle, mid
6Proto-Indo-Europeanmédʰyosmiddle
7Proto-Indo-Europeanmedʰi-with, among; with, along
8Proto-Indo-Europeanmein the middle of, near, by, around, with
Every word from Proto-Indo-European meEvery word from Proto-Indo-European medʰi-Every word from Proto-Indo-European médʰyos
post-midnight — Etymology, Origin & Word History | Etymology Explorer