This area handles appointments: defining what is available, and tracking what has been booked.
The calendar is the source of availability
A calendar defines which days and hours can be booked, how long an appointment lasts, what is asked of the person booking, and whether payment is required.
A visitor never types an arbitrary time; they pick from slots generated by those settings. When a time is not offered on the site, the answer is almost always in the calendar's configuration rather than in any individual appointment.
Round-robin calendars
A calendar can rotate across several staff members instead of belonging to one. Bookings then go to whoever is next in the rotation — the person booking does not choose.
Cancelling and rescheduling without an account
The link sent to the person booking carries its own signature. That is how someone with no account can cancel or reschedule their own appointment without being able to reach anyone else's by editing the URL.
Treat the link like a key: whoever holds it can change that one appointment.
Reminders are automatic
Reminders go out ahead of the appointment, at the offset configured on the calendar. A background scheduler does this, so delivery is close to the configured moment rather than exact.
If reminders are not arriving at all, the cause is usually the platform's email configuration rather than the calendar. A guest who booked with only a mobile gets no email at all; they are reached by text only if booking SMS is turned on in Booking → Settings and the site has an SMS line that can send ordinary messages.
You decide how customers are reached
Booking → Settings sets which contact details every booking must include — email, mobile, both, or either one — and whether booking texts are sent. Choose by what you have actually set up: email needs the site's mail settings, texts need a free-text SMS line.