I tend to get impulsive on these things sometimes. I checked the used music store on the way home this morning (where I got 2 Fan Collectives and DS9:Season7 last month, but they had no Enterprise.
And that monthly bill was with the corner mom & pop type convenience store, where they let me run a tab because I've shopped there for 15 years.
So I might get an urge to spend the big bucks early while I have them, and worry about it around the 15th, when I'm usually broke anyway. And this is a short month, so March's check will be less of a wait.
Either way, I'll add the extra $100 to my usual more than minimum credit card payment, and try to sit on it as long as I can.