On January 9, a National Day of Mourning will be observed in honor of former President Jimmy Carter, leading to the closure of various services across the United States. The U.S. Postal Service has announced that all post offices will be closed and regular mail delivery will be suspended to commemorate this day. In addition, federal agencies, many banks, and stock markets such as the New York Stock Exchange will also close their doors, reflecting the significance of the mourning period. Local changes vary, with some areas detailing specific closures and service adjustments. Residents are advised to plan accordingly as they navigate what will be open and closed during this time of remembrance.