Oracle Help Center | Oracle Push Cloud Service (Standalone) title

Scheduled Push

You can schedule pushes up to 30 days in advance using our intuitive interface. You can even use natural language phrases like send "in 30 minutes" or at "6:30 PM" as well as by any local or UTC timezone.

This has long been a feature under the hood in the API, but is now easier to accomplish via the Web Dashboard:

"PushIO Web Dashboard, Scheduled Push"