Confirmations
A confirmation message is a great way to let your customers know the appointment has been successfully added to your calendar and confirm the details with them. Confirmation messages are sent based on when you activate the reminder. For example, you can send the confirmation message immediately after activating the reminder or set a delay.
If you make a change to your appointment's date or time, a new confirmation message will automatically be sent. This ensures that changes to your customer's appointment are communicated with your customer. Updating other details in your appointment (such as the Title, Description, etc) will not trigger a new confirmation message.
Reminders
Reminder messages are sent in advance of the appointment start time. For example, 1 hour before the appointment starts. If you appointment start time isn't specific or has a range, the reminder will still be sent based on the time of the appointment in your calendar. You can accommodate a time-range by indicating so in your reminder message. For example: "Your appointment will start within 2 hours of {time}."
All-day appointments are assumed to start at Midnight. If a reminder is set for 24hrs in advance of an all-day appointment, it will be sent at Midnight the day before.
Follow-Ups
Follow-up messages are sent after the appointment completes. This is the end time of the appointment in your calendar.
All-day appointments are assumed to end at 11:59pm.