How do I change the displayed month in the calendar app? I can only see April!?
You can't! You can literally only see the current month. Seems like a rather huge oversight.
Does anyone know if there is anyway to re-establish connection between watch & phone, without having to power the phone off & back on again?
It should happen automatically, but I guess did not in your case for some reason.
Sorry if this question has been asken and answered before, but can the watch switch to tell military time?
Yes.
Is there a way to set the duration for the screen to stay on? I want it to stay on for 30 secs or so.
No, but if you tap the screen to wake it instead of just raising your wrist it stays on for at least twice as long.