The parade day is the more important day to take off since that's going to be an all day event, 100% take that day off (likely Wednesday, unless weather delays it like last time).

I'm on a small team of about 7 and a few of us are in Philly, while our PM is a cowboys fan (from and lives in Dallas). He likes to plan ahead and polls us for any upcoming PTO for the next quarter, so early December he's asking for that and I mention the possibility of needing the Monday after SB off, as well as the Wednesday or Thursday that follows, depending on weather, in case the Birds win it all. He said to me, "I've never had to plan around winning the Superbowl before", with a little shimmer of a tear in his eye. I almost felt bad for him for a second there. GO BIRDS!