The National Day of Mourning also extends to the stock market.
USPS Mail Trucks
Credit: ullstein bild/Getty Images

The United States Post Office is revered for its fierce dedication to delivering the mail, no matter the weather.

"Neither snow nor rain nor heat nor gloom of night stays these couriers from the swift completion of their appointed rounds," the historic establishment's motto decrees. But tomorrow, as the country comes together to mourn the death of former President George H.W. Bush, even the steadfast USPS will be marking the occasion with a rare pause in service.

Former President Bush passed away late Friday night at the age of 94. The 41st president's memorial service will take place Wednesday at the National Cathedral in Washington D.C. In tribute, Wednesday has been declared a National Day of Mourning.

"Out of respect for the 41st President of the United States and to honor his vast contributions to our country during his lifetime, and consistent with the Presidential Proclamation, the United States Postal Service will suspend regular mail deliveries, retail services and administrative office activity on Dec. 5," the postal service announced on its website.

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The announcement went on to explain the very limited service that will be available.

"We will provide limited package delivery service on that day to ensure that our network remains fluid and we do not experience any impacts to our package delivery operations that might negatively affect our customers or business partners during the remainder of our busy holiday season."

The stock market will also be closed in honor of the late president.