Gallaudet is closed on both Thanksgiving Day and Friday.
Thanksgiving Day is a federal holiday celebrated on the fourth Thursday in November. The holiday began in 1621, when Puritans, who had just enjoyed a bountiful harvest, showed their gratitude to the Native Americans for their help by hosting a feast to give thanks. The Thanksgiving feast became a national tradition and almost always includes some of the foods served at the first feast: roast turkey, cranberry sauce, potatoes, and pumpkin pie.
More information about other American federal holidays and common national observances.