Trades are not placed on the days that markets are closed. You can still place orders in your Stockpile account and they will show as "Pending" until they can be processed the next day the market is open.
Money movement, like deposits or withdrawals to your bank account, could be delayed an extra day due to the holidays.
Stockpile is closed on the following stock market holidays:
Monday, Jan. 17 — Martin Luther King Jr. Day
Monday, Feb. 21 — Presidents' Day
Friday, April 15 — Good Friday
Monday, May 30 — Memorial Day
Monday, June 20 — Observance of Juneteenth, as June 19 is a Sunday
Monday, July 4 — Independence Day
Monday, Sept. 5 — Labor Day
Thursday, Nov. 24 — Thanksgiving Day
Monday, Dec. 26 — Observance of Christmas Day, which occurs on a Sunday