Special Event Day With Multiple Services

How do I program the booking calendar for a special event day with more than one service option on that day? These will only be offered on a set day, like mini sessions, so I don't want them in as regular services. 

On the day prior to grad, I need to offer 
1. Cap & Gown Photos
2. Family Photos

These will be done at the same location, but they are different prices and different amounts of time. 

You would need to create 2 different booking special events for each. 

You could create  a new booking section for just this and both services would be offered on the same page.

And it won't mess up the calendar having 2 services offered as special events for the same date and times?

It won't mess up the calendar.