M365 Apple iCal/Calendar (How To) Change Calendar Views
Apple iCal/Calendar provides four different views for calendar events: Day, Week, Month, and Year. One can shift the view of one's calendar using the menu, the keyboard, or the mouse.
With your mouse, click on the desired view on bar of buttons in the top center of the main iCal/Calendar window.
From the menu bar, select View and choose the desired view from among the first four options.
Using the keyboard, press Cmd-1 for Day, Cmd-2 for Week, Cmd-3 for Month, and Cmd-4 for Year.
More help can be found on Microsoft's support page at the following link: Change the Calendar View