If you celebrated hard New Year's Eve, you're likely marking an unusual holiday on Tuesday.
Jan. 1 is known as National Hangover Day. It comes every New Year's Day -- when you're feeling the effects of all that champagne and adult beverages you drank to ring in the New Year.
The best way to celebrate National Hangover Day is to get plenty of rest and drink fluids.
New Year's Day marks National Hangover Day