ante diem v kalendas martias
- 50 A.D. — The emperor Claudius adopts the future emperor Nero
- 116 A.D.– supplicatio pro salute Traiani (day 1)
- 138 A.D. — The emperor Hadrian adopts the future emperor Antoninus Pius
rogueclassicism 
Isn’t it ante diem IV kalendas martias? it’s not a leap year.
Probably … I think I’ve been digging into the wrong file on this (and I did the same a couple of years ago) … apologies for the confusion
It’s quite alright. I like showing your “this day in ancient history” post to one of my Latin classes and we just did a chapter on the Roman Dating system.. they caught the mistake and thought I should say something
They’re obviously learning well!
dm