Robinhood will be closed on the following U.S. market holidays in 2017:
New Years Day (January 2)
Martin Luther King, Jr. Day (January 16)
Washington's Birthday (February 20)
Good Friday (April 14)
Memorial Day (May 29)
Independence Day (July 4)
Labor Day (September 4)
Thanksgiving Day (November 23)
Christmas (December 25)
Fund and stock settlement time frames will not count on these days.
Additionally, Robinhood will close at 1pm EST (with after-hours trading concluding at 3pm EST) on the following U.S. market half-days in 2017:
Day before Independence Day (July 3)
Day following Thanksgiving (November 24)
Fund and stock settlement time frames will count on these half-days.