When you clone a Booking you will be presented with the following options to copy over:
Contacts
Custom Fields
Events
Line Items
Notes
Group
A conflict check is completed on the Events and a notification will appear if there are any conflicts.
At this point in time no other items can be brought over in a Booking.
The new Booking will follow the same date pattern as the original. So for example, if you clone a Booking with an Event, and the Event starts two days after the Booking Start Date. The same will be true for the clone.