Let Wine Country — another one of Amy's movies — inspire you and a friend to set up a Napa-style tasting. Whoever has the most wine knowledge can play the role of sommelier, while the other makes wine-friendly snacks.
Based on this hilarious scene in Bridesmaids, bake a "giant f*cking cookie" for your friend. But instead of putting it on display in the yard, eat it along with homemade pink lemonade. (Mmm, that's fresh.)
If you'd prefer to stay in, copy the gals in Little Women and spend the day brushing up on your favorite past-times. Spend the day following a painting tutorial, teaching yourselves how to cross-stitch, or reading poetry. Whatever strikes your mid-1800s fancy.
If you ever side-eye your extensive (and untouched) cookbook collection, why not crack one open on Galentine's Day and prepare a fancy French dish for your friend, à la Julie & Julia?
Recreate the amazing sleepovers you used to have by staying up all night, just like they do in 13 Going on 30. To make it extra old school, dance around to Whitney Houston, Pat Benatar, and Talking Heads.
Have you always wanted to write songs together? Then tear a page from The Runaways and do it! Mark Feb. 13 as the day you start your band. And who knows? By this time next year, you might even be performing on stage.