President Donald Trump signed into law the “Vietnam War Veterans Recognition Act of 2017” on Tuesday, just in time for the annual National Vietnam Veterans Day observance, which was set to be celebrated Wednesday. The law, previously known as S. 305, “encourages the display of the U.S. flag on March 29,” Trump announced in a tweet Tuesday night.

The legislation could also be seen as important because it can raise awareness of the plight of Vietnam War veterans, many of which have long maintained that their treatment once they returned home from fighting abroad left much to be desired.

Former President Barack Obama called the treatment of Vietnam Veterans a “national shame” in 2012.

“It was a national shame, a disgrace that should have never happened. That’s why here today we resolve that it will not happen again,” Obama told veterans at the Vietnam War Memorial in Washington, D.C., on Memorial Day that year. “You were often blamed for a war you didn’t start when you should have been commended for serving your country with valor.”