November 30, 2017
Last month we announced a new Google Calendar interface on the web. It applies a modern color palette and sleek design using a responsive layout that auto-adjusts to your screen size. Try it out today by clicking Use new Calendar at the top of your calendar web view. If for some reason you want to switch back to Classic Calendar, you can find it in the new Calendar settings.
The current Classic Calendar will remain available until February 28, 2018. Google will then switch all Classic Calendars to the new Calendar. Learn more at the Google support site.