3900

The year 3900 will start on Monday, January 1, and end on Monday, December 31. It will be an exceptional common year, like the years 2100, 2200, 2300, 2500, 2600, 2700, 2900, 3000, 3100, 3300, 3400, 3500, 3700, and 3800. Also, it will be the last year of the 39th century.

Calendar with holidays
Holidays:
 * New Year's Day: Monday, January 1
 * Epiphany: Saturday, January 6
 * Martin Luther King Jr. Day: Monday, January 15
 * Groundhog Day: Friday, February 2
 * Super Bowl Sunday: Sunday, February 4
 * Lincoln's Birthday: Monday, February 12
 * Mardi Gras: Tuesday, February 13
 * Ash Wednesday: Wednesday, February 14
 * Valentine's Day: Wednesday, February 14
 * Washington's Birthday: Monday, February 19
 * Daylight Saving Time Starts (clocks spring forward): Sunday, March 11 at 2:00 AM, which becomes 3:00 AM
 * Pi Day: Wednesday, March 14
 * Saint Patrick's Day: Saturday, March 17
 * Palm Sunday: Sunday, March 25
 * Good Friday: Friday, March 30
 * Cesar Chavez Day: Saturday, March 31
 * April Fools' Day: Sunday, April 1
 * Easter: Sunday, April 1
 * Earth Day: Sunday, April 22
 * Cinco de Mayo: Saturday, May 5
 * Mother's Day: Sunday, May 13
 * Armed Forces Day: Saturday, May 19
 * Memorial Day: Monday, May 28
 * Flag Day: Thursday, June 14
 * Father's Day: Sunday, June 17
 * Juneteenth: Tuesday, June 19
 * Independence Day: Wednesday, July 4
 * Labor Day: Monday, September 3
 * National Grandparents' Day: Sunday, September 9
 * Patriot Day: Tuesday, September 11
 * Constitution Day: Monday, September 17
 * Columbus Day: Monday, October 8
 * Indigenous Peoples' Day: Monday, October 8
 * Sweetest Day: Saturday, October 20
 * National Trick or Treat Day: Saturday, October 27
 * Halloween: Wednesday, October 31
 * Daylight Saving Time Ends (clocks fall back): Sunday, November 4 at 2:00 AM, which becomes 1:00 AM
 * Election Day: Tuesday, November 6
 * Veterans Day: Sunday, November 11
 * Thanksgiving: Thursday, November 22
 * Black Friday: Friday, November 23
 * Small Business Saturday: Saturday, November 24
 * Cyber Monday: Monday, November 26
 * Giving Tuesday: Tuesday, November 27
 * Pearl Harbor Remembrance Day: Friday, December 7
 * Christmas Eve: Monday, December 24
 * Christmas: Tuesday, December 25
 * Kwanzaa: Wednesday, December 26, 3900, to Tuesday, January 1, 3901
 * New Year's Eve: Monday, December 31