World Zombie Day
World Zombie Day is held on October 13. This event in the second decade of the month October is annual. 
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World Zombie Day is an international annual event that grew from Pittsburgh’s first Zombie Walk at Monroeville Mall on 13th October in 2006, – the site where George Romero filmed Dawn of the Dead – to help all fans of Zombie culture come together in an international effort to relieve hunger and homelessness. More than 50 cities worldwide participate in World Zombie Day, including New York, Pittsburgh, Paris, Hong Kong, Los Angeles, Chicago, Dallas, Seattle, and Tokyo.
Similar holidays and events, festivals and interesting facts
Moment of Frustration Day on October 12 (is the opportunity to let your frustrations out);
Old Farmers Day in USA on October 12
Diver's Day on October 12
International Suit Up Day on October 13
No Bra Day on October 13 (On this day women are encouraged to forgo wearing no bra as a means to encourage breast cancer awareness);
International Skeptics Day on October 13
Be Bald And Free Day on October 14
National Graffiti Appreciation Day in USA on October 14