I made a small Christmas Hat you can put on your avatar.
Feel free to edit it in any way you want and you can also redistribute it.
I suggest adding it in Blender or any other 3D software of choice so you can customize the fit to your liking.
The Package contains a PBR and Toon variant. For the Toon variant, i used PoiyomiToonShader make sure to grab it from https://github.com/poiyomi/PoiyomiToonShader and import it before the hat.
I also created a simple PBR shader with animatable scrolling emission so you can have the same effect for the PBR Version.