Gov. Jared Polis ordered the Colorado and American flags to be lowered to half staff on all public buildings statewide Monday in honor of National Pearl Harbor Remembrance Day.

National Pearl Harbor Remembrance Day has been recognized annually on Dec. 7 since 1994.

The day honors the 2,403 Americans killed and 1,178 injured during the Japanese attack on Pearl Harbor on Dec. 7, 1941. The attack damaged or destroyed nearly 20 U.S. ships and over 300 airplanes.

The day after the surprise attack, President Franklin D. Roosevelt asked Congress to declare war on Japan, entering the U.S. into World War II.

Survivors remember Pearl Harbor at home this year amid virus

Though most celebrations will be virtual this year, over a million people visit the Pearl Harbor National Memorial in Honolulu, Hawaii, each year to honor the victims of Pearl Harbor.

“We solemnly honor and uphold the memory of the patriots who lost their lives that day,” said President Donald Trump’s presidential proclamation. “The attack on Pearl Harbor shocked all Americans and galvanized our Nation to fight and defeat the Axis powers of Japan, Germany, and Italy.”

“Today, we memorialize all those lost on December 7, 1941, declare once again that our Nation will never forget these valiant heroes, and resolve as firmly as ever that their memory and spirit will survive for as long as our Nation endures.”