A national day of mourning will be observed on Thursday for Jimmy Carter, who died on Dec. 29 at 100 years old.

In a proclamation after Mr. Carter’s death, President Biden called him “a man of character, courage, and compassion.”

In announcing the day of mourning, he said: “I call on the American people to assemble on that day in their respective places of worship, there to pay homage to the memory of President James Earl Carter Jr. I invite the people of the world who share our grief to join us in this solemn observance.”

The day of mourning will be held on the same day as Mr. Carter’s funeral at Washington National Cathedral. President Biden will deliver a eulogy at the funeral, and a eulogy written by Gerald R. Ford, who died in 2006, will be read by his son Steven Ford.

American flags at the White House, public buildings, military bases, naval ships and U.S. embassies around the world have been ordered to be flown at half-staff to honor Mr. Carter for the 30 days following his death.

On Dec. 30, President Biden ordered that “all executive departments and agencies of the Federal Government shall be closed on Jan. 9,” except those necessary for “national security, defense, or other public need.” Federal employees will still be paid for the day.

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