Gold Star Mother's Day is observed in the United States on every last Sunday of September. This national observance honors mothers who have lost sons or daughters in the line of duty in the U.S. Armed Forces. The day was established in 1936 and is recognized in Title 36 of the United States Code, although it is not a public holiday. Events are organized to commemorate those who died while serving, and government buildings are required to display the nation's flag. The American Gold Star Mothers, Inc., founded by Grace Darling Seibold after World War I, provides support for these mothers. As of 2014, the organization had over 900 members, and non-citizens were accepted starting in 2005. In 2012, President Barack Obama rededicated the day as “Gold Star Mother's and Family's Day.”