back in 98 my friends used to call Wednesday "wet wednesday" cause the traffic always seemed to be 25% up on any other day could never work it out, but now it seems to be Tuesday-Thursday as Dr Bizzaro said, however my sales are also higher at this time.
Also right after kids go back to school from holiday's I see a surge of sales like the parents have stayed away from the computer for the last few weeks/months and just go on a spending spree
regards
garv