CHARLOTTESVILLE, Va. (WVIR) - Monday marked a special day for the family of a University of Virginia graduate who made the ultimate sacrifice.

A post office in Charlottesville now bears the name of Captain Humanyun Khan, who would have celebrated his 43rd birthday on Monday. Khan died while in service to the United States in 2004 during Operation Iraqi Freedom.

"It is an emotional day for us," said Humanyun's father Khizr Khan. "It's a sentimental day, but it's heartwarming to see the support."

Khan was killed by an improvised explosive device outside of his base in Iraq. His efforts saved the lives of more than 100 soldiers.

"He lived the 'for all' creed," said Senator Tim Kaine, who attended the ceremony. "Liberty and justice shouldn't just be a few, or one kind of nationality or one religion, but liberty and justice should be for every person and that is what he believed."

During the ceremony at the Barrack's Road post office, Khan's father remarked on the three best decisions his son ever made: attending UVA, joining the ROTC, and eventually joining the U.S. Army to put service ahead of himself.

"This tribute is to the University of Virginia, his alma mater, where he learned what public service is all about," Khizr Khan said. "What makes this nation great is the spirit of public service among all of its citizens."

Senators Tim Kaine and Mark Warner have been strong advocates for dedicating the post office in honor of Captain Khan. Both houses of Congress passed legislation to dedicate the post office and President Trump signed the final bill into law in April.