April 20 is the 110th day of the year (111th in leap years) in the Gregorian calendar. There are 255 days remaining until the end of the year.

Year 420 (CDXX) was a leap year starting on Thursday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Theodosius and Constantius (or, less frequently, year…