How to switch to the day calendar with iOS 7
To toggle from month to week view, turn the phone sideways.

Day view is dependant on whether or not you have the list view on or off [highlighted in blue] If that's on, the day's events appear underneath the month. If it's off, tapping a day will take you to that day's view.

Once in Day view, the same button will then toggle between single day &amp; list of upcoming events view.

Month view




Week view
 



Day view




Event list