I have a group of leads in a module in Zoho CRM. One of the fields in that module is a date and time e.g. 25/8/2020 17:30. This date & time represents when they will be leaving my attraction. Is there a way to use this date and time to trigger an SMS to them at this time (or maybe with a one hour delay?) 

I can work out how to get the module to sync with zoho marketinghub, but not a way to send an SMS message based on the date and time in each lead (they are all different).

Any ideas? 

Thanks