Christmas Cactus

I have a lovely Christmas Cactus that is  probably over 10 years old. 

It started off as a tiny plant and turned into a monster.

However, it never blooms at Christmas! Only around Halloween and again at Easter!

And only if I put it outside for the summer.....
if not, 
it grudgingly gives me only a few blooms.
What a brat, right?
but what a lovely brat.