Blake Lively celebrates Galentine’s Day

Leslie Knope once called it “only the best day of the year.”

No, she wasn’t talking about Valentine’s Day, but Galentine’s Day, a day for girlfriends, which is celebrated the day before, on Feb. 13.

Never mind that it was a made-up holiday by a made-up character played by Amy Poehler on “Parks and Recreation,” actress Blake Lively went all out for Galentine’s Day, hosting an event for L’Oreal Paris for New York Fashion Week with her sister Robyn Lively and mom Elaine.

“I thought, right now, more than ever, it’s so great that women are coming together and supporting each other and building each other up,” Lively told E! News. “I got a little too involved. I said, I don’t really just want to show up. I sort of want to plan it. It’s a lot more fun to plan a party when it’s not on your dime. I changed…