ASSTMCHRI?

Starting off with what looks like a mall decorated for Christmas. From this one, we can conclude that unintentional mishaps can occur during the festivities.

I guess they tried a more intricate concept by creating a meta decoration for Christmas, displaying the word alongside other decorations.

However, it is always important to remember that, in many cultures where their language is based on the Latin alphabet, the convention of reading is from left to right and top to bottom. And this tip applies to all sorts of decorations that use these detached words!

I am not sure if organizing the words as they should be read would keep the tree shape that ASSTMCHRI does, but maybe they will come up with another decoration next year.