I would use a functional global to store the boolean, or skip the boolean all together and just have the functional global store the time. The global should have read and write funtionality, and when you use the write method it should update the time...
You mention events and events do not need to be local. You can create a user event and pass the reference to that event wherever you want. By putting it into a functional global e.g. you can have an event structure react to the event one place and have other parts of the code fire the event by using the reference from the global...not many limitations really.
