Do it tomorrow.
Tomorrow is Friday, too close to Shabbos, definitely can't do it on shabbos. Sunday? What, you think I'm going to waste my day off for that? Monda it is. No, wait, that's a holiday, I finally have a day off! Tuesday I'll be busy catching up on the post-holiday load, so maybe Wednesday? Shoots, Wednesday I already scheduled those meetings I couldn't do because of the holiday and catching up, and Thursday I am catching up on what I missed because of Wednesday's meetings. Darn it, Friday is too close to Shabbos...