International Translation Day is an annual observance held on September 30. It was formally established by the International Federation of Translators in 1991, although the celebrations have been held since 1953.
Blasphemy Day is an observance aimed at encouraging people to freely express criticism of religion and blasphemy laws that exist in some countries. It was founded in 2009 by the Center for Inquiry. The observance is held on September 30.
Day of Justice Bodies Employees is an official professional holiday in Kazakhstan celebrated on September 30. It was established in 2012 by the Law “On Holidays in the Republic of Kazakhstan” and the Presidential Decree “On Professional and Other Holidays in the Republic of Kazakhstan”.
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.
On September 30, Mexicans celebrate the birthday of José María Morelos who is regarded as the national hero and one of the founding fathers of the Mexican nation. Morelos' birthday is a civic holiday, which means that it is observed nationwide, but employees are not given a paid day off.
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.