I bought a small Christmas Cactus at Home Depot a few years ago. Each year it gets a little bigger. It stays in my south window all winter and really does nothing much except enjoy the winter sunshine, and then in the spring it goes outside. I don't water it, I just leave it up to Mother Nature to look after it.
And then as soon as it starts to get colder at night I bring it in.
And I noticed that it was covered with tiny pink buds.Obviously spending the summer outside and being ignored agrees with it.
Only a week later, the whole plant is covered with pink blooms. Just gorgeous.
It's giving me my Christmas present a couple of months early.