Swag, AKA corporate imprint clutter
It usually comes from the marketing dept. They give it out at project kickoff. Sometimes managers hand it out to reward workers. Then there’s it’s worst form, the leftovers. Your boss is tired of holding onto the last few bits from last year’s product launch, so he stages a contest or uses some other gimmickry to justify giving you the perpetual calendar of which you already have three. You don’t want to refuse. It’d make things awkward with your coworkers. But you’re probably not thinking of whether or not you want it, where you’re going to put it or that you have two stuck in a box somewhere.