Programmers' Day is an international professional day celebrated on the 256th day of the year. It falls on September 13 during common years and September 12 during leap years. The holiday is observed in many countries, but Russia is the only country where it is recognized officially.
The second Sunday in September is Remembrance Day for Victims of Fascism. This day is observed in many countries around the world, by people, whose families or friends fell as victims of fascism during World War II.
International Chocolate Day is an unofficial holiday, dedicated to the sweetest and tastiest dainty in the world – chocolate. This day is celebrated on September 13, since it's birthday of Milton S. Hershey, an American confectioner and founder of worldwide known company The Hershey Chocolate Company.