Fix timezone reading when making a reservation
Fix timezone reading when making a reservation

All Appointment dateTimes are stored in UTC, thus the desired appointment
time must be translated from the business local timezone to UTC.

Later on the time is presented in the business local time to the user.

timegridio/timegrid,alariva/timegrid,alariva/timegrid,timegridio/timegrid,alariva/timegrid,timegridio/timegrid,alariva/timegrid