never, in 5 years on the Internet, figured out this late (say 20 DEC - Jan 4) period.
Yea I usually just chill out during this period and bring in the reins a bit, but this year I need to hit a sales level which kinda stinks. In the last week I need the equivalent of 1-2 'big' days from mid-dec. It will be close but I'm gonna press for it.