That's because Finnish developer Rovio has just launched Angry Birds Seasons (complete with Xbox Live achievement support) on the Windows Phone Store.
This physics-based puzzler, which set up a nest in Apple's App Store all the way back in October 2010, contains more than 300 levels all based around real-world special occasions.
There are pumpkin-packed Halloween-themed levels, for example, Christmas stages that are filled with candy canes, and lovey-dovey Valentine's levels.
Rovio has promised to add even more stages via regular updates, so you're definitely getting your money's worth with this 79p / 99c app.
Tickled your pickle? You can grab Angry Birds Seasons from the Windows Phone Store right now [buy].Windows Phone Central