In a word, the Roman calendar was unreliable ... Renee Salzman remarked in "The Cambridge Companion to Ancient Rome," the calendar was so far out of whack by Caesar's time that in 44 B.C ...

The ancient Egyptian calendar consisted of 365 days without ... the festival occurred at different times of the year. During the Roman occupation of Egypt from the mid-1st to mid-3rd centuries ...

January 1 celebrated as New Year’s Did you know that the early Roman calendar consisted of 10 months and 304 days, and every new year used to begin at the vernal equinox; as per the tradition ...