March 15 is the 74th day of the year (75th in leap years) in the Gregorian calendar. There are 291 days remaining until the end of the year. This date is slightly more likely to fall on a Tuesday, Thursday or Sunday (58 in 400 years each) than on Friday or Saturday (57), and slightly less likely to occur on a Monday or Wednesday (56).
In the Roman calendar, March 15 was known as the Ides of March.