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You’ll have to use two scenarios for that, since you cannot pause a scenario halfway.
You can have a scenario schedule a cron job callback using apps like 0CodeKit that allows you to schedule a “callback” to a URL defined in a “Custom Webhook” trigger in another scenario at the exact time you want
You don’t have to use a data store, this is just an example. You can use Google Sheets, Google Calendar, etc.
Alternatively, if you are already using Airtable, you can use an Airtable formula and built-in automation, briefly mentioned here.