Here are all of them! * New Year's Day (January 1). * Birthday of Martin Luther King, Jr. (Third Monday in January). * Washington's Birthday (Third Monday in February). * 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). * Christmas Day (December 25). Source: https://www.opm.gov/FAQs/QA.aspx?fid=e64d74ab-20a3-484c-8682-d2a2b46c22da&pid=c41e6beb-0c14-449d-bde5-355a3a3014cd
Note, these aren't presidental observances, those are federal holidays.
Yeah, I'm fairly certain there were more festivals observed and enjoyed by people in Europe during the middle ages; at least one per month.
