Then-President Joe Biden ordered flags be flown at half-staff for 30 days following the death of former President Jimmy Carter.

In a proclamation issued Dec. 29, Biden ordered flags across the U.S. to be flown at half-staff for 3 days "in honor and tribute to the memory of President James Earl Carter Jr. and as an expression of public sorrow."

Flags across Arizona and the U.S. have been flying at half-staff for nearly a month, but they will soon return to full-staff. Here's what to know

Flags in Tennessee and around the U.S. continue flying at half-staff. Here's when they'll return to full-staff.