October 21st, 1010 was a Sunday.
September 24th, 1010 - October 23rd, 1010
Why not celebrate an alternative birthday? In 1000 days, exactly on April 21st, 2029, people who were born on October 21st, 1010 will be 372,000 days old!
Fixed holidays (Christian feast day) which are celebrated on October 21st.
| M = 1000 | X = 10 | I = 1 |
No: With 365 days 1010 is a normal year and no leap year.