In general, when scheduling shops, if a date is listed, say June 6th, as the "due date" but you apply and accept the shop on June 1st (the first day the shop can be performed) , can you usually perform the shop any of those dates. I've had shops that say they have to be done on a certain day and/or time but most do not. Since many of these ask you to state a date you can perform the shop (Sassie scheduling) is that dates flexible during that window? I've been doing shops on the exact date I picked but then I noticed a couple companies listed that the shops just need to be done BY that due date, not ON the due date.