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Calendar → Settings → Notifications. One channel — WhatsApp — one template, and up to three send times, for every appointment on the calendar.
Calendar Settings Notifications page showing the WhatsApp Business Account 'dialtu waba +15551477012 · 3 approved templates', a banner 'The Dialtu default template is not registered on dialtu waba' with a Register template button, the Reminder card (Not registered, toggle on) using the 'Dialtu default' template, and 'Send before appointment' chips with 1 hour and 1 day selected (2 of 3 chosen).

WhatsApp reminder settings for the calendar

Settings

Templates are approved per account, so changing the account changes which templates you can pick.

The Dialtu default template

A platform template, sent in the client’s language automatically. Its status reads Approved, Pending Meta review, Rejected by Meta or Not registered — press Register template (or Re-register) to submit it to Meta on this account.

Your own template

Pick any approved Utility template. Then Fill in the placeholders: bind each {{n}} to an appointment field — client_first_name, client_full_name, professional, service, event_type, when — or to Fixed text. Add a Header image if the template has one. Preview shows the result.

How reminders behave

  • Scheduled when the appointment is booked, for every chosen offset.
  • A reminder whose time has already passed when you book is skipped, not sent late.
  • Rescheduling reschedules them; cancelling cancels them.
  • Sent as a WhatsApp template message on the account above; replies land in Conversations and are handled by the agent assigned to that account.
  • Send WhatsApp reminder on a card’s right-click menu sends one now, by hand.
Changing these settings needs WhatsApp write permission; without it you can see the page but not edit it.

What doesn’t exist

  • SMS or email reminders.
  • Per-appointment send times — offsets are calendar-wide.
  • A confirmation message at booking, or a reminder to the professional.
  • A reminder log in the UI.

Next step

Google Calendar

Mirror bookings to a professional’s own calendar.