Yesterday we met the second character in the calendar - everyone's favourite snowman, Olaf (though apparently that's under debate). Even better, he didn't come empty-handed, bringing plenty of sugary treats for everyone to enjoy, including what I now think is a fruitcake!
It seems likely that this calendar is based on Olaf's Frozen Adventure, the short film released a few years after the original movie. That makes sense, considering it takes place at Christmastime. That also explains why...