Monday, January 17th is the official day to celebrate the Rev. Martin Luther King's birthday in this year of 2022! Many events will also be taking place during this weekend before Monday.
As with other Federally observed holidays, there will be no mail deliveries from the USPS (United States Postal Service), banks and some other businesses will be closed, etc.
https://thekingcenter.org/king-holiday-2022/