Personally, I dislike the mobile version of Google Calendar, because I have many extra calendars running at once and I like the week view, not the day or month views. In the mobile version of Google Calendar, you cannot choose the week view, so these screenshots will help you switch to the Desktop version. Look for the button at the bottom of the display. You will see it says Mobile Version or Desktop version. If you decide that the mobile version is your thing, you can use the other screen shot to find the button to switch to the Mobile Version.
Cheers and Enjoy!