How?: "Repeat" Events/Tasks wanted duration AFTER "Dismiss"?

[ted939]

When I create a Task or Event, I know I can set "Repeat" to Does not repeat, daily, weekly, every weekday, bi-weekly, monthly, yearly and custom. Custom allows for variations of some of those choices.

HOWEVER, what I want to do is to set Repeat to be some certain amount of time (i.e. days, weeks, months, etc) AFTER the point in time where I Dismiss the the Event or Task Reminder.
For instance, if I change my oil in my car, I can Dismiss the Task Reminder, and then the Repeating Task will send another Reminder 3 months after I hit Dismiss.

Is this possible? If so, how to do it?

Thanks!
Ted

[Decathlon]

I think this is not possible because, as far as I know, it's not an iCalendar specification:
https://tools.ietf.org/html/rfc5545