If there's one thing about latin that really annoys me, it has to be the way Romans named dates; instead of saying "January 2nd" they had to be crazy and say "5 days before the Nones of Ianuarius" - quite a mouthfull if you ask me:
Latin Dates (of the months)
*In March May July, and October, these dates change
To form a date: Count back from that date (e.g. "Kalends"), including the day you are starting on; examples: "November 2:" "4 days before Nones"; "April 30:" "pridie Kalendas Maias" ("on the day before May 1); etc.