It's a day when the country celebrates a sweet treat that is super cheesy.
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This simple dessert has several variations including the New York style, the Philadelphia style, and even a Chicago style.
But, it was the Greek style that started it all.
According to the National Day Calendar, an ancient Greek physician wrote a book on the art of making cheesecakes thousands of years ago.
And some restaurants today are even giving out deals on cheesecake to honor the special day today.
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Cheesecake Factory restaurants will have half-price cheesecake all day long, but there is a limit of one slice per person at 50-percent off.
Also, all customers dining at Texas de Brazil restaurants today can get a free slice of cheesecake to celebrate the day.