Nokia Lumia 830 - Send an I’m Running Late message for an appointment

Your phone has a neat feature where if you’re running late for appointment, you can quickly notify the person you’re supposed to be meeting.

First, go to your Calendar App and you should see four options at the bottom. One of these should say Late and should have a symbol of a person running.

Press this and the person you’re meeting will be notified with some sorry text.