No, you do not have to. The moment you are booked for a request, an event is automatically created. In your calendar, this event is displayed on the date and time when customer needs the request.
If the customer gave more than 1 date&time option on when he needs the request, this event is displayed on the date & time you chose during quote submission
If the customer did not provide a time on when he needs the request, this event is displayed at 7 am of the date you selected
Note: By default, all events created have a 1 hour duration