The WEEKLY DEALS is a weekly digest email sent to readers signed up for the genre of your choice. This mailing uses a different sending engine than the Daily Deal itself, so some readers who miss the Daily Deal for whatever reason (spam filters, timing, vacations...) may get this mailing. (And if they get both, even better! we all know the data about how people often need to see things multiple times before they react...)
Mailing goes out EARLY on Wednesdays and covers that Wed until the next Wed. So if your deal is on a Tuesday only and you submit it the Monday before - that won't work for the weekly mailing. But if you submit on Monday for a Daily Deal on Tuesday, and your book is on sale Tues-Thurs, for example, then you're good - Daily Deal will go out on Tuesday and you'll be included in the Weekly Deals on Wed. showing the end of your sale on Thursday.