3644

The year 3644 will start on Friday, January 1, and end on Saturday, December 31. It will be a leap year.

Calendar with holidays
Holidays:
 * New Year's Day: Friday, January 1
 * Epiphany: Wednesday, January 6
 * Martin Luther King Jr. Day: Monday, January 18
 * Groundhog Day: Tuesday, February 2
 * Super Bowl Sunday: Sunday, February 7
 * Lincoln's Birthday: Friday, February 12
 * Valentine's Day: Sunday, February 14
 * Washington's Birthday: Monday, February 15
 * Mardi Gras: Tuesday, February 23
 * Ash Wednesday: Wednesday, February 24
 * Leap Day: Monday, February 29
 * Daylight Saving Time Starts (clocks spring forward): Sunday, March 13 at 2:00 AM, which becomes 3:00 AM
 * Pi Day: Monday, March 14
 * Saint Patrick's Day: Thursday, March 17
 * Cesar Chavez Day: Thursday, March 31
 * April Fools' Day: Friday, April 1
 * Palm Sunday: Sunday, April 3
 * Good Friday: Friday, April 8
 * Easter: Sunday, April 10
 * Tax Day: Monday, April 18
 * Earth Day: Friday, April 22
 * Cinco de Mayo: Thursday, May 5
 * Mother's Day: Sunday, May 8
 * Armed Forces Day: Saturday, May 21
 * Memorial Day: Monday, May 30
 * Flag Day: Tuesday, June 14
 * Father's Day: Sunday, June 19
 * Juneteenth: Sunday, June 19
 * Independence Day: Monday, July 4
 * Labor Day: Monday, September 5
 * National Grandparents' Day: Sunday, September 11
 * Patriot Day: Sunday, September 11
 * Constitution Day: Saturday, September 17
 * Columbus Day: Monday, October 10
 * Indigenous Peoples' Day: Monday, October 10
 * Sweetest Day: Saturday, October 15
 * National Trick or Treat Day: Saturday, October 29
 * Halloween: Monday, October 31
 * Daylight Saving Time Ends (clocks fall back): Sunday, November 6 at 2:00 AM, which becomes 1:00 AM
 * Election Day: Tuesday, November 8
 * Veterans Day: Friday, November 11
 * Thanksgiving: Thursday, November 24
 * Black Friday: Friday, November 25
 * Small Business Saturday: Saturday, November 26
 * Cyber Monday: Monday, November 28
 * Giving Tuesday: Tuesday, November 29
 * Pearl Harbor Remembrance Day: Wednesday, December 7
 * Christmas Eve: Saturday, December 24
 * Christmas: Sunday, December 25
 * Kwanzaa: Monday, December 26, 3644, to Sunday, January 1, 3645
 * New Year's Eve: Saturday, December 31