How do I show all calendar events in "Today view" in iOS 9?
I don't know if by "Today's View" you actually mean the iOS 9 "Todays View" or the Calendar Widget. To activate the Calendar Widget scroll to the end of your Notification Center and touch "Edit" and add the Calendar Widget.

Now, regarding how the info of your next appointments on the Calendar Widget will look like, it depends on how you present them on the actual Calendar App.

As you can see in the pictures bellow, on the left you have a relative presentation of the events and on the right an absolute presentation.

I hope this clarifies things a bit.