Just recently I've been unable to schedule appointments with my Calendar app on my 6S. Software up-to-date, iOS 11.4.1. Don't know when this became a problem. Now when I try to schedule an appointment, I'm able to load all the needed data when I hit the + button, name, time, alert, but when I hit the "add", the screen go back to showing the whole month, but my appointment ISN'T there. Another strange thing in the appointment setup is that it only shows one alert option whereas before, it always showed 2 alert options. As a test, I just entered an appointment on my wife's iP8 and the appointment did show up. I'm thinking maybe I changed something in Calendar that caused this malfunction. Would sure like to get it back as it's my DAY TIMER. Any ideas as to why my Calendar app doesn't work correctly?