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Tin mining day (stylized as TIN MINING DAY) is a holiday annually taking place on July 17th created by an indie game dev called The Unlucky Dev (or Kid Unlucky) online. Everybody collectively performs an action related to tin. It doesn't necessarily have to be mining tin, but you could use a tin can, make something out of tin foil, even just thinking about it is fine. It is the day to acknowledge the existence of tin and the god of tin, Huptan.
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