The company says all you have to do is show up at one of their stores during business hours on August 20 and you'll get a free pretzel.
In 1998, Dan DiZio and his college roommate Len Lehman opened the doors to the first Philly Pretzel Factory in the Mayfair section of the city. There are now more than 170 stores nationwide.
In 2017, the company moved its headquarters to Bensalem, Bucks County.
Philly Pretzel Factory is using the #PPF20years on social media to honor the milestone.
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