1900

The year 1900 started on Monday, January 1, and ended on Monday, December 31. It was an exceptional common year, like the years 1700 and 1800. Also, it was the last year of the 19th century. The next exceptional common year will be the year 2100.

Calendar with holidays
Holidays:
 * New Year's Day: Monday, January 1
 * Epiphany: Saturday, January 6
 * Groundhog Day: Friday, February 2
 * Lincoln's Birthday: Monday, February 12
 * Valentine's Day: Wednesday, February 14
 * Washington's Birthday: Thursday, February 22
 * Mardi Gras: Tuesday, February 27
 * Ash Wednesday: Wednesday, February 28
 * Saint Patrick's Day: Saturday, March 17
 * April Fools' Day: Sunday, April 1
 * Palm Sunday: Sunday, April 8
 * Good Friday: Friday, April 13
 * Easter: Sunday, April 15
 * Cinco de Mayo: Saturday, May 5
 * Decoration Day: Wednesday, May 30
 * Juneteenth: Tuesday, June 19
 * Independence Day: Wednesday, July 4
 * Labor Day: Monday, September 3
 * 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

iOS Calendar bug
There is currently a bug in the iOS Calendar app that causes the calendar for 1900 to incorrectly show February 29. See https://developer.apple.com/forums/thread/134090 for the bug, as well as the screenshot below.