May 10th, 1021 was a Thursday.
People born on May 10th, 1021 (assuming the person is still alive) would have turned 1005 years old this year (2026).
April 21st, 1021 - May 21st, 1021
Why not celebrate an alternative birthday? In 906 days, exactly on November 26th, 2028, people who were born on May 10th, 1021 will be 368,000 days old!
Fixed holidays (Christian feast day) which are celebrated on May 10th.
| M = 1000 | X = 10 | V = 5 | I = 1 |
No: With 365 days 1021 is a normal year and no leap year.