Add Santa hat and maybe some other seasonal features

[dumbmatter]

Would be fun to show everyone in a Santa hat on Christmas, for example.

[tomkennedy22]

I imagine this isn't an urgent need as Christmas has already passed, but I could take a pass at this in the coming weeks (or anyone else if you beat me to it). Lmk if any other fun items like this and I can put some thought in

Also, a fun reading on unintended outcomes from Easter Eggs, but shouldn't be a big concern for FJS :D - https://blog.shunliang.io/frontend/2018/12/25/the-ant-design-xmas-egg-that-went-wrong.html

[dumbmatter]

There will be another Christmas next year!