You'll find that if you ask the day before & the day after the sale dates that most retailers are willing to accomodate your request of a reduced price. Or if your AJ Prime, two days This is known as the buffer period. There are exceptions of course, such as 50% off items, but if a retailer is confident that there are sufficient amounts to satisfy customer interest on the first day of a sale, it shouldn't be an issue. Be sure to speak to the relevant Manager or senior staff member.