September 3rd, 1040 was a Thursday.
August 24th, 1040 - September 23rd, 1040
Why not celebrate an alternative birthday? In 915 days, exactly on January 21st, 2029, people who were born on September 3rd, 1040 will be 361,000 days old!
Fixed holidays (Christian feast day, China's victory over Japan commemoration related observances) which are celebrated on September 3rd.
| M = 1000 | XL = 40 | IX = 9 | I = 1 |
Yes: 1040 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).