666

The year 666 started on Thursday, January 1, and ended on Thursday, December 31.

Calendar with holidays
Holidays:
 * New Year's Day: Thursday, January 1
 * Epiphany: Tuesday, January 6
 * Mardi Gras: Tuesday, February 10
 * Ash Wednesday: Wednesday, February 11
 * Valentine's Day: Saturday, February 14
 * Saint Patrick's Day: Tuesday, March 17
 * Palm Sunday: Sunday, March 22
 * Good Friday: Friday, March 27
 * Easter: Sunday, March 29
 * Halloween: Saturday, October 31
 * Christmas Eve: Thursday, December 24
 * Christmas: Friday, December 25
 * New Year's Eve: Thursday, December 31