“This is what Loyola is all about,” she said, donning her maroon-and-gold striped scarf and custom-made Nikes. “This is what Rogers Park is about, and I appreciate everyone who is here today. I almost thought classes had started when I saw all the students here already.”

After the party, Head men’s basketball coach Porter Moser celebrated Sister Jean with a birthday message on Twitter, sparking the hashtag #SisterJean100.

In an interview with USA Today, Sister Jean revealed her secret to living a long life, with an emphasis on one key detail: joy.

“I try and look upon the joy I find in everyone,” Sister Jean said. “Joy is so important. Sometimes you’re going to have sad days, but that doesn’t mean we’ve lost our joy. You can still have that.”

This 100-year-old basketball-loving nun has the secret to a long and happy life