President Trump has proclaimed Wednesday, December 5, 2018 as a National Day of Mourning in remembrance of former President George H.W. Bush.

To honor President Bush for his vast contributions to public service during his lifetime, the U.S. Postal Service will observe a day of mourning and will suspend regular mail delivery and Post Office/retail services on Wednesday, December 5.

USPS Operations That Will Continue on Wednesday, Dec 5 Service Status Priority Mail Express All Priority Mail Express items will be delivered as scheduled. Package Pickup USPS will conduct scheduled package pickup requests. IMPORTANT! No new package pickups are being scheduled for December 5. Plant Operations All plant operations, including Network Distribution Centers (NDC) and Sectional Center Facilities (SCF), will operate as scheduled except delivery point sequence (DPS) processing. FAST appointments will be accepted. Air & Surface Transportation Air and Surface transportation operate as scheduled, and scheduled dispatches to Post Offices will occur. USPS Customer Support Call Center In operation but may have reduced staffing. Delivery Destination Units (DDU) All DDUs will accept drop shipments.

USPS Operations That Will Be Suspended on Wednesday, Dec 5 Service Status General Mail Delivery Regular USPS mail delivery will be suspended. There will be limited package delivery consistent with our Peak Season Sunday schedule. Post Office/Retail Post Offices will be closed. All retail operations will be suspended. Collection Box (Blue Boxes in Streets) Mail will be collected from boxes in front of Post Offices and high volume boxes that have a potential to overflow. All other box collections will be suspended. Business Mail Entry Unit (BMEU) The BMEU/Detached Mail Unit (DMU) in plant locations will be open, while BMEU operations will be suspended at Post Office locations. USPS Administrative Offices including Headquarters All administration offices will be closed.

Get more info from USPS.com.