Just a sample site of a possible usage of DateTimeExtensions nuget package.
January 01 New Year
January 21 Birthday of Martin Luther King, Jr.
February 18 Washington's Birthday
May 27 Memorial Day
July 04 Independence Day
September 02 Labor Day
October 14 Columbus Day
November 11 Veterans Day
November 28 Thanksgiving Day
December 25 Christmas
DateTimeExtensions DateTimeExtensions