Lots of things are changing. Like writing down 2008. But the Shake Shack custard calendar? Say whaa? This is messing with my head. As Blondie and Brownie reports, the Shake Shack's January custard calendar isn't divided by seven weekdays, but by the four weeks. A call to Shackville just now confirmed this is only a cold weather move; nothing permanent. If it's super unpopular, they'll even move back to the daily routine in February. But most likely, we'll be robbed three flavors a month until March. Attention all salted caramel freaks out there: you can get your fix everyday next week!