1800

The year 1800 started on Wednesday, January 1, and ended on Wednesday, December 31. It was an exceptional common year, like the years 1700 and 1900. Also, it was the last year of the 18th century.

Calendar with holidays
Holidays:
 * New Year's Day: Wednesday, January 1
 * Epiphany: Monday, January 6
 * Valentine's Day: Friday, February 14
 * Mardi Gras: Tuesday, February 25
 * Ash Wednesday: Wednesday, February 26
 * Saint Patrick's Day: Monday, March 17
 * April Fools' Day: Tuesday, April 1
 * Palm Sunday: Sunday, April 6
 * Good Friday: Friday, April 11
 * Easter: Sunday, April 13
 * Independence Day: Friday, July 4
 * Halloween: Friday, October 31
 * Christmas Eve: Wednesday, December 24
 * Christmas: Thursday, December 25
 * New Year's Eve: Wednesday, December 31

iOS Calendar bug
There is currently a bug in the iOS Calendar app that causes the calendar for 1800 to incorrectly show February 29. See https://developer.apple.com/forums/thread/134090 for the bug, as well as the screenshot below.