We call it: Big deals.

You can start and end the special offers on a specific date and limit them by day of the week and time of day.
Like special offers, but much, much more convenient!

This has been a problem with XT shops for years:

As soon as you create special offers, the shop no longer takes the retailer prices into account.
Even if the retailer price is higher than the special offer for end consumers, the retailer could always only buy the product at the special offer price.

With our extension, only the dealer prices are now taken into account for dealers, not the special offer prices.