I know the Ides was 15th March, but I was idly wondering what day of the week Julius Caesar was killed. (I’m assuming this date is in the Julian Calendar, which was introduced in 45 BC.)
I did a cursory web search, but it’s complicated. There seems to be a lot of different things to take into account: the difference from our Gregorian calendar, changes in the lengths of months, what happened between 1BC and 1AD, leap years, what date the year in question started, whether days have always been continuous, and doubtless more.
Also as an aside and if anyone knows, what’s the oldest event for which we have the exact date i.e. day-month-year? What day of the week was it? (I’ve a theory that Tuesday is the most rubbish day of the week.)