Yesterday was Togers' birthday. My ex-wife said she asked Mr M in the morning if he'd wished Togers a happy birthday. Mr M said that he hadn't, because he "wasn't celebrating [Togers'] birthday."
Later, when it was time for cake and ice cream, Mr M insisted that he didn't want any cake, just ice cream. I asked him about it this morning. He didn't want any cake, because that would've been celebrating Togers birthday.
So if you were ever wondering where to draw the line between celebrating something and not celebrating, it's this:
Cake and ice cream = celebrating
Just ice cream = not celebrating