Specify when certain services can be booked
Some services can only be booked during certain times. Bookings should support the equivalent of "working hours" on a service level.
As a locum medical doctor it would be realy useful if I can specify at which time a certain service is avaliable. eg I have daytime services whitch start at 8 am an evening services at 5 or 11 pm. The 11 pm service is a night shift and that causes the 8 am shift to be selectable at different times during the next day. Setting fixed/adjustable start times per service would remediate that for me, using the buffertime I can prevent sequential services to be booked