664

The year 664 started on Monday, January 1, and ended on Tuesday, December 31. It was a leap year.

Calendar with holidays
Holidays:
 * New Year's Day: Monday, January 1
 * Epiphany: Saturday, January 6
 * Valentine's Day: Wednesday, February 14
 * Leap Day: Thursday, February 29
 * Mardi Gras: Tuesday, March 5
 * Ash Wednesday: Wednesday, March 6
 * Saint Patrick's Day: Sunday, March 17
 * Palm Sunday: Sunday, April 14
 * Good Friday: Friday, April 19
 * Easter: Sunday, April 21
 * Halloween: Thursday, October 31
 * Christmas Eve: Tuesday, December 24
 * Christmas: Wednesday, December 25
 * New Year's Eve: Tuesday, December 31