Following the death of former President Jimmy Carter on December 29, President Joe Biden declared a national day of mourning in honor of the humanitarian leader on January 9, the day of Carter’s funeral in Washington, DC

The tradition, which began with a one-day government shutdown following the assassination of Abraham Lincoln in 1865, is one of many ways the United States honors its late presidents. Biden’s statement also stated that all American flags displayed at public and military sites worldwide must be flown at half-staff for 30 days following Carter’s death.

Although a national day of mourning is not recognized as an official federal holiday and many of the businesses normally affected by national celebrations are not closed, some organizations are affected by the day of remembrance.

Here’s what’s open and closed on National Day of Mourning this Thursday.

Will mail be delivered on National Day of Mourning?

Mail will not be delivered on Thursday. In an executive order issued on December 30, Biden declared that all federal agencies, including the United States Postal Service, would be closed in honor of Carter’s funeral on January 9.

All federal employees should have the day off, except for those most critical to the country’s “national security, defense or other public needs,” the announcement said.

The ruling also applies to all US courts, including the Supreme Court.

Will banks be open on National Day of Mourning?

Most banks will remain open on Thursday because it is not an official federal holiday.

Will the stock exchange be open on National Day of Mourning?

In a statement released on December 30, Lynn Martin, president of the New York Stock Exchange Group, announced that all markets would be closed on January 9 out of respect for President Carter.

“Jimmy Carter, who came from humble roots as a farmer and family man, dedicated his life to public service and defending our freedom,” Martin wrote in the statement. “During his remarkable post-presidency life, President Carter left a lasting legacy of humanity.”

Will schools be open on National Day of Mourning?

Similar to most banks across the country, most public schools will remain open on Thursday because it is not an official federal holiday.

However, in accordance with the National Day of Mourning protocol, all organizations associated with the educational activity of the US Department of Defense, including all military schools, will be closed.

In photos: Jimmy Carter’s state funeral