Calendar problems after ios 9 upgrade.

iPhone 6, iOS 9 (calendar worked 'normally') BUT iOS 9.0.1 (some days will not open).

"Today" will open the current day for details.

Once a single day details are open, I can move to another day. I can move within a day's details (scroll through hours) and appointment details.

Actually, some people report using a double-tap to open a single day easily. I have found and others agree that quickly tapping the day and not leaving your finger there is working as well. Not sure exactly if there is an issue, or if Apple made changes and just did not indicate them. I'm searching the online User Guide to see if it mentions it.

After looking at the iOS 9 User Guide for the iPhone, it makes me wonder if this has something to do with the 3D Touch feature of the iPhone 6s and 6s Plus. When you read the iOS 9 guide, it talks about how you can tap on a day to see the list of information, or it mentions this for the newer devices.

Peek at a day’s events. On iPhone 6s and iPhone 6s Plus, in the monthly calendar, press a date to peek at that day’s schedule, then swipe up to see actions. Or, press deeper to pop open the schedule.

I wonder then with the older phones if keeping your finger on the screen for a longer period of time, as if to press rather than tap, it is confusing the iOS. Just a guess on my part. That could be why a double-tap or quick tap works.

Chris - you are a genius. Thanks for solving the problem I was having with Calendar.

You're both welcome.

I just upgraded to iOs 9.02, which seemed to remedy the problem with Calendar on my iPhone 6.

iOS 9 and iOS 9.0.1 double tap worked consistently and single tap generally worked for first "day" I choose to view detail. iOS 9.0.2 double tap seems to be the only working option.

Couldnt open day from month view with single tap of thumb but did with double tap

funny but with smaller finger opened day view well with single tap

Have you hear of problems setting alerts? When I set an alert and then try to set the then try to set a second alert both alerts show the same. So if I want alert 1 to be a day before and second alert 2 hours before both alerts show 1 day before. Anyone else having that problem?

I just tested editing a future event and creating a new event with the same criteria you describe for alerts and it took those alerts. I exited the calendar, and upon coming back they were still set correctly. Not sure but what troubleshooting have you tried?

I looked online and saw several suggestions. I went into settings and checked my iCloud settings and I went to calendar and set default to 1 day. Other than that I've been looking around online trying to see if anyone else is having that and can't find anything. My wife has same p as me and I had her try it and she's having same issue. But I think she's still on iOS 9.02 as well

I'm on iOS 9.0.2 on an iPhone 6s. So I wonder if having a default alert is what is causing the problem. I don't have a default alert set, and I'm able to adjust mine as indicated earlier. When does this change to both showing the same? Are you setting the correct alerts, then saving it, but when you look at it, it has changed, or does it change as soon as you try to set it?

I Didn't have any default alert set either. I only changed that after reading an article online. I go into calendar and create an event. Then I go down to alerts and set the alert then select second alert and when I go back to the event after setting second alert both alerts show what I chose for the first alert. so if I set alert 1 to one day then choose second alert and select 2 hours then the back arrow both alerts show 1 day.