September 23rd, 1004 was a Sunday.
August 25th, 1004 - September 23rd, 1004
Why not celebrate an alternative birthday? In 806 days, exactly on September 14th, 2028, people who were born on September 23rd, 1004 will be 374,000 days old!
Fixed holidays (Christian feast day) which are celebrated on September 23rd.
| M = 1000 | X = 10 | IX = 9 | IV = 4 | I = 1 |
Yes: 1004 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).