Arbor Day in the United States Virgin Islands is celebrated on the last Friday in September. The holiday originated in the late 19th century in the American state of Nebraska, it is celebrated to help people appreciate the importance of trees for our environment.
September 25 is National Harki Day (also known as Day of National Recognition for the Harkis) in France. This observance was introduced in 2001 and it commemorates Harki, Muslim Algerian loyalists who served in French Army during the Algerian War (1954-1962).
Western world is familiar with sandwiches, while butterbords are unknown. However, they are known in Germany, where this special dish comes from. This dish saw a steady decline but since 1999 it's being revived by celebrating Butterbrod Day on the last Friday in September.