December 31st, 1052 was a Friday.
December 22nd, 1052 - January 20th, 1053
Why not celebrate an alternative birthday? In 412 days, exactly on September 11th, 2027, people who were born on December 31st, 1052 will be 356,000 days old!
Fixed holidays (Christian feast day, New Year's Eve) which are celebrated on December 31st.
| M = 1000 | L = 50 | X = 10 | I = 1 |
Yes: 1052 is a leap year, therefore has a 29th of February with an additional leap day and a total of 366 days (instead of the usual 365 days in a normal year).