I want to send appointment reminders the day before it

I want to send appointment reminders (Tagged w/ Confirmed Event Update) the day before someone has made it which may be 7-10 days in advance of when they had last contact with a chatbot. ( Meta, IG, Whatsapp )

Correct me if I'm wrong but SendPulse does NOT currently support native time-based campaign scheduling from a chatbot flow using a stored appointment date/time variable. You would have to send an appointment reminder manually to individual contacts via the chatbot campaign tool. Yes?

To send something after the 24-hour window, an external system ( my own API backend ) would be needed in order to trigger a campaign message with the proper message tag Confirmed Event Update.

I just want to confirm the correct technical approach before implementing an external scheduling solution.

Thank you!

Hey Jose Torres,

Thank you for your question 😊

So, this depends on which messenger you’re using, so that part is important.

For Facebook and Instagram, it’s not possible to add a pause in a chatbot flow longer than 24 hours. This is a Meta restriction — automated messages can’t be sent after the 24-hour window, so the flow can’t continue automatically beyond that.

For WhatsApp, longer pauses are supported. You can:

set pauses longer than 24 hours,
continue the flow using approved message templates,
build logic based on variables (for example, pause until a specific date),
and decide inside the flow whether to send a regular message or a template, depending on whether the 24-hour window is still open.

There is currently no separate trigger that automatically starts a flow based on a dynamic date (like “one day before an appointment”). This logic needs to be handled inside the flow itself or via the API.

Sending reminders via the API is possible and works well for non-mass sends. The API also allows you to assign tags.

If the last interaction was less than 7 days ago, the HUMAN_AGENT tag is usually the right choice.
In other cases, the tag depends on the message content and situation.

👉 API documentation for sending chatbot messages can be found here:

In short: Facebook and Instagram are limited by the 24-hour rule, while WhatsApp provides much more flexibility for appointment reminders.

I hope this helps 😁