The Official Roblox My Little Pony world has been updated a few times, with this most recent Winter update bringing snow and cozy Wishday themed apparel to the game. Apparently it's coming to an end though, with an announcement on the page noting that they will be removing it on the 3rd of February this year.
Get your pony on while you can over here. And if you need a 3D pony home, you could always make an OpenPony too~
Thanks to Las Noticias MLP for the heads up!