1866

The year 1866 started on Monday, January 1, and ended on Monday, December 31.

Calendar with holidays
Holidays:
 * New Year's Day: Monday, January 1
 * Epiphany: Saturday, January 6
 * Lincoln's Birthday: Monday, February 12
 * Mardi Gras: Tuesday, February 13
 * Ash Wednesday: Wednesday, February 14
 * Valentine's Day: Wednesday, February 14
 * Saint Patrick's Day: Saturday, March 17
 * Palm Sunday: Sunday, March 25
 * Good Friday: Friday, March 30
 * April Fools' Day: Sunday, April 1
 * Easter: Sunday, April 1
 * Cinco de Mayo: Saturday, May 5
 * Juneteenth: Tuesday, June 19
 * Independence Day: Wednesday, July 4
 * Halloween: Wednesday, October 31
 * Election Day: Tuesday, November 6
 * Thanksgiving: Thursday, November 29
 * Christmas Eve: Monday, December 24
 * Christmas: Tuesday, December 25
 * New Year's Eve: Monday, December 31