No, Stock Markets in the United States are closed on Memorial Day, Monday, May 29, 2023
In The United States, Memorial Day 2023 is a Federally recognized holiday. It always falls on the last Monday in May and is a day to honor military personnel who have passed away while serving. In 2023, Memorial Day falls on Monday, May 29, 2023. The Stock Market will be closed on Memorial day, however the Stock Market should open on the following Tuesday, May 30 as normal.
Source 1 - https://www.nyse.com/markets/hours-calendars