Because if it weren't Christmas it would be the middle of winter--tough to put someone out in the middle of winter. Then it would be springtime, and it's such a darned HOPEFUL time of year--tough to put him out then. Then it's glorious summer and so many things are going on--vacations and stuff. Then before you know it, it's fall, with more holidays on the horizon.
Seriously, there is no time like the present.
I'm a big believer in "Moments of Clarity"--I had one when I quit drinking, and I've heard many other alcoholics and addicts talk about it. And I've also heard a lot of partners of alcoholics/addicts talk about it--that moment when the fog lifts and you can clearly see what needs to be done.
Here's the thing about this Moments of Clarity. In my experience/observation, they have a limited shelf-life. The window opens, the fog clears, but if you don't MOVE and ACT on it, the window closes, the fog moves back in, and it may be a long time before it opens again.