Alarm clock feature

Would it be possible to create a time variable?
I’ve seen loads of questions and ideas about this, but there’s hardly any solution without using tasker or other extra apps.

My idea is to have a time trigger, that can be adjusted by the time wheel from a dashboard and has an off function.

It could be used for running rules together with a set alarm for example. I’m thinking I’d use it to actually set my alarm with a Pushover message and set my status to awake or something.