World First Aid Day is a global observance held on the second Saturday in September. It was instituted by the International Federation of Red Cross and Red Crescent Societies (IFRC) in 2000 and has been celebrated each year ever since.
Day of Energy Industry Workers is an official professional holiday in Turkmenistan celebrated on the second Saturday in September. It was established in 2003 as Day of the Employees of the Oil, Gas, Energy and Geological Industries, but its name was shortened for the sake of convenience.
Mindfulness Day is an annual event held on September 12. It was created by Wisdom Publications, a publisher of Buddhist books and practical works on mindfulness.
Saint Patrick's Battalion Remembrance Day is observed in Mexico on September 12. It honors the immigrants and expatriates of European descent (mostly Irish) who fought on the side of Mexico during the Mexican-American War and were hanged by American soldiers.
September 12 is United Nations Day for South-South Cooperation. This observance was officially established in December 2003. It was originally observed on December 19, but in 2011 the date was moved to September 12.