Flags in Arizona and across the U.S. continue to fly at half-staff in honor of former President Jimmy Carter.

On the death of a former president, the U.S. Flag Code states that flags must be flown at half-staff for 30 days. In the case of Carter's death that means flags will be lowered until sunset on Jan. 28, including on Inauguration Day .

Governors in some states, such as Texas and Tennessee , have ordered flags be flown at full-staff on Inauguration Day to properly celebrate the start of Donald Trump's presidency.

Gov. Katie Hobbs has not issued any similar orders, and the Governor's Office did not respond to multiple requests for comment.

Here's what to know about U.S. flags, including how long they'll remain at half-staff and what half-mast means.

How long will flags be at half-staff?

The 30-day mourning period for a deceased president is a federal mandate outlined in the U.S. Flag Code.

For former President Jimmy Carter, this means flags will remain at half-staff until at least Jan. 28, covering both the presidential inauguration and the first week of Trump’s second term.

What is the difference between half-mast and half-staff?

Typically, the difference between the two is where the flag is being flown. Half-mast refers to flags flown on ships, while half-staff is used for flags flown on land.