how to schedule a Django script to run at a certain date and time

Anyone knows how to schedule a Django script to run at a certain date and time?

Example:

User enters someone’s contact info on frontend, Django backend receives the form data, but doesn’t send the contact an email until 48 hours later.

Anyone has an idea? I saw Cron, but looks like Cron needs to be executed and doesn’t automatically execute on its own? Just need help learning the scheduling feature.