Currently there are 11 Federal Holidays
- New Year's Day - first day in January
- Martin Luther King, Jr. Day - third Monday in January
- Inauguration Day - January 20, every fourth year, following Presidential election
Observed only by federal government employees in Washington, D.C., and certain counties and cities of Maryland and Virginia, in order to relieve congestion that occurs with this major event. Note: Takes place on January 21 if the 20th is a Sunday (although the President is still privately inaugurated on the 20th). - Washington's Birthday - Third Monday in February - Often popularly observed as "Presidents Day" in recognition of other American presidents, such as Abraham Lincoln (who was born February 12). The legal name of the federal holiday, however, is "Washington's Birthday", not "Presidents Day". (historically observed on February 22, prior to passage of the Monday Holiday Bill by Congress)
- Memorial Day - Last Monday in May
- Independence Day - July 4
- Labor Day - First Monday in September
- Columbus Day - Second Monday in October
- Veterans Day - November 11
- Thanksgiving Day - Fourth Thursday in November
Traditionally celebrates giving thanks for the autumn harvest, and customarily includes the consumption of a turkey dinner. (historically observed on various days, but finally becoming so fixed to the fourth Thursday in November in the hearts and minds of Americans, that Americans rebelled (albeit politely) when President Franklin Delano Roosevelt attempted to move it to the third Thursday of November, at the request of numerous powerful American merchants) - Christmas Day - December 25
source
Wikipedia