The White House will be illuminated with blue lights tonight to honor law enforcement, President Trump announced Monday.

Monday is Peace Officer Memorial Day, the first major event in Police Week, which is commemorated May 14-20.

"Our liberties depend on the rule of law, and that means supporting the incredible men and women of law enforcement," President Trump said in a proclamation signed Monday. "During Peace Officers Memorial Day and Police Week, we honor the men and women of law enforcement who have been killed or disabled in the course of serving our communities.

"Police officers are the thin blue line whose sacrifices protect and serve us every day, and we pledge to support them as they risk their lives to safeguard ours."

The president is also requesting American flags fly at half-staff to memorialize fallen officers.

According to the White House, 118 law enforcement officers died in the line of duty last year, with 66 of those people the "victims of malicious attacks," an increase of nearly 40 percent from 2015.

It's the second time the Trump White House has been lit blue. The president previously used the color to mark World Autism Awareness Day.