All of the awesome calendar "next step" top bar buttons are on the left of the top bar, except the"save" button which is on the right. That position is counter intuitive.
Suggestion: Move the save button to the left side of top bar. Then when finishing an event and moving back to the main calendar, all the tapping to get back to the calendar will be on the left and a user can easily tap their way back without thinking about which button to tap.
Try it, you will see what I mean
Richard