Change how you view events in Calendar on iPhone
In the Calendar app , you can view one day, a week, a month, or a year at a time, or view a list of upcoming events. To change your view of Calendar, do any of the following:
Zoom in or out: Tap a year, month, or day to zoom in or out on your calendar. In week or day view, pinch to zoom in or out.
View a weekly calendar: In day view, rotate iPhone sideways.
View a list of events: In month view, tap to see the day’s events. (Tap again to return to month view.)