Bookings service on two following days within a week every two or three weeks

Hi everyone,

I need to create a service in Bookings that lasts for 2 days and repeats every 2 weeks on Thursdays and Fridays. It should not be possible to book Fridays as first day. 

I've already done the following:

1. Created a new service
2. Set the duration to 2 days
3. Defined the days when the service should be available:
   • August 24 and 25
   • September 7 and 8
   • September 28 and 29

The first test went well, but then I realized a problem. If I don't book the first day as the start day, it's possible for the first day to be on August 25 and the second day to be on September 7. This is a problem because this is a basic training that we offer to people who come to our company. It's not possible to attend the training on the second day before attending the first day.

I would like to have an option in the service that says "only allow this if there are two following days available." Is there a way to do this in Bookings?

I would like it to be only possible to select the first day of the dates.

Thanks in advance for your help!

Regards, Peter