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Holidays for Sunday, January 1st, 2017

January 1st, 2017 is National Hangover Day

Also known as Bad Hangover Day

Observed annually on January 1st

January 1st, 2017 is Polar Bear Swim Day

Also known as Polar Bear Plunge Day

Observed annually on January 1st

January 1st, 2017 is Z Day

Observed annually on January 1st
Things that happened on this day in years past