Is it even possible? We're coming in from Venice on the train that day around 1:30. Didn't even think about it being Sunday or close to a holiday. There are a couple places open in Florence that Sunday (Santa Croce is one from what I can tell) and on New Year's Day that take the card. Not sure it's worth getting one if we can only use them Tuesday and Wednesday. Plus, we didn't want to have our time in Florence that rigidly scheduled by getting tickets in advance. For example, I've been to the Uffizi already and may not want to go again ... but once I get there may change my mind :) I know we have to schedule the Duomo no matter what we end up doing but their website isn't letting us schedule for January yet.
Anyway, any idea if it's possible to get a Firenze Card at the train station (or anywhere else for that matter) on a Sunday after 1 PM?