Change Checkin setting to add 18 hours prior to booking start time or if possible add the additional 1 hour increments of 13 - 23 hours to the settings option.

The reason for the request is that if the booking start time is 8:00am and you us the 12 hour in advance setting for checkin that means employees would be allowed to checkin starting at 8:00pm at night. Do not see many employees being alert at night to do that. Instead I do see employees doing a checkin between the hours of 12:00pm and 5:00pm during working hours, plus the checkin notifications will remind them of their booking for the next day.