The listed holidays are legal holidays in Washington.
Martin Luther King, Jr. Day (third Monday in January)
President's Day (third Monday in February)
Memorial Day (last Monday in May)
Labor Day (first Monday in September)
Sundays
New Year's Day (January 1)
Independence Day (July 4)
Veterans' Day (November 11)
Thanksgiving Day (fourth Thursday in November)
the day after Thanksgiving
Christmas Day (December 25)
If any legal holiday falls on a Sunday, the following Monday is a holiday and if it falls on a Saturday, the preceding Friday is a holiday.