Reliable alternative to a long term wait.

My idea is for there to be a native and simple alternative for a several day long wait action. I know that there are some workarounds (JSON stuff, Calendar workarounds, etc...) but the ones I've seen all leave something to be desired.   

My use case for this is have a popup when I disable my alarm that asks me how many days I want to disable it for then reactivating it after the time has passed.