How Booking Works
A page that offers times, and a form that captures the person. Two halves, each doing a different job.
What It Is
A calendar on its own is private — a record of your time. What makes it bookable is a booking schedule: the rules that decide which times you are willing to offer, how long a meeting is, and how far ahead people may plan.
Add a schedule and the calendar gains a public booking page at its own address. A visitor opens it, sees the times you are offering in their own timezone, and picks one.
But picking a time is not yet a booking. Clicking a slot hands the visitor to the schedule's connected form, carrying the chosen time with them. The form asks who they are. Submitting the form is what creates the meeting, saves the contact, and sends out the invitations.
So a booking is made of two parts: the schedule and its page decide when, and the form decides who — and the form is the half that actually commits the booking.
Why It Matters
That split explains most of what surprises people.
It explains why a booking page can look fine and book nothing. If no form is connected, the times appear, the visitor picks one, presses the button, and nothing happens. The page did its job; there was nothing to hand over to.
It explains why bookings arrive with CRM data attached. Because the booking is a form submission, everything the form knows how to do happens too — the contact is created or matched, answers are mapped to fields, notifications fire, and the booking is attributed to whoever the form's routing says owns it.
It explains what to change when the wrong times are offered. The times come from the schedule's availability windows, not from your business hours and not from the calendar's settings. If a Saturday evening is on offer, a schedule is offering it.
And it explains why the same calendar can be offered several different ways: each schedule is its own set of rules with its own page, so one calendar can present a 20-minute intro and a 90-minute review as two separate things to book.
How It Works
Working out which times to offer. For each day in the window, Zyntro takes the availability windows you set for that weekday and walks through them, producing a candidate slot of your chosen length at every step of your chosen interval. A slot only counts if it fits entirely inside the window.
Each candidate is then checked against reality: anything already on the calendar removes the slots it overlaps, and anything in the past is dropped. On a group calendar a slot survives if any eligible member is free for it.
What is left is the free set. If you have capped how many times to offer per day, Zyntro picks that many from each day's free set and holds the rest in reserve.
Making the booking. The visitor's choice is carried to the connected form along with where they chose to meet. The form submission creates the event on the calendar, saves or matches the contact, decides the host on a group calendar, and sends the invitations.
Afterwards. The booking carries links to cancel or reschedule, so the person who booked can change it without going through you — and both sides stay informed.
Examples
A 30-minute intro call, offered weekday mornings
You set availability of 09:00 to 12:00 Monday to Friday, a slot length of 30 minutes and an interval of 30 minutes. Each weekday morning offers 09:00, 09:30, 10:00, 10:30 and 11:00 — the 11:30 candidate is dropped because a 30-minute meeting starting then would run past noon.
The same window, but you only want three calls a day
Set the daily cap to 3. The page offers three of that morning's free times rather than all five, which protects the rest of the morning without you blocking it out by hand. The times offered are chosen from what is free, so they vary.
Someone books while you are already busy
They cannot. A meeting already on the calendar removes the slots it overlaps before anything is offered, which is why keeping your commitments on the calendar matters more once a booking page exists.
Two different meeting types on one calendar
Create two schedules on the same calendar — a 20-minute intro and a 90-minute review — each with its own availability, its own form and its own link. Both draw on the same calendar, so a booking on either blocks the other.
A visitor in another country
Zyntro works out their timezone from their connection and shows your times converted into it, so they are choosing from their own working day. The meeting is stored once, and each side reads it in their own timezone.
Important: A booking schedule needs a connected form to be bookable. The booking page offers the times; the form is what collects who the person is and what actually creates the booking. Without one, a visitor can pick a slot and press the button and nothing at all will happen — no error, no booking. Always set the connected form before sharing a booking link.
Info: Business hours do not limit what a booking page offers. They shade your calendars and inform how Zyntro judges sensible timing, but the only things that remove a slot are the schedule's own availability windows and the events already on your calendar.
