In a tradition that's clearly tailored to their west coast consumer base, Sonic is pushing half-price shakes this Saturday in honor of the Winter Solstice, the shortest day of the year. Because it's not cold enough already without us all sitting at an outdoor drive-in slurping down steins' worth of frozen cream.

At least they'll make good re-gifting fodder?

H/T Brand Eating + Picthx Sonic