1638

The year 1638 (in the Gregorian calendar) started on Friday, January 1, and ended on Friday, December 31.

Calendar with holidays
Holidays:
 * New Year's Day: Friday, January 1
 * Epiphany: Wednesday, January 6
 * Valentine's Day: Sunday, February 14
 * Mardi Gras: Tuesday, February 16
 * Ash Wednesday: Wednesday, February 17
 * Saint Patrick's Day: Wednesday, March 17
 * Palm Sunday: Sunday, March 28
 * April Fools' Day: Thursday, April 1
 * Good Friday: Friday, April 2
 * Easter: Sunday, April 4
 * Halloween: Sunday, October 31
 * Christmas Eve: Friday, December 24
 * Christmas: Saturday, December 25
 * New Year's Eve: Friday, December 31