January 10, 2018
Last fall Google launched a new user interface for Google Calendar on the web. Google will require all Calendar users to upgrade to the new interface by February 28, 2018, when they will retire the classic version.
If you have not already upgraded to the new interface, you can click the "Use new Calendar" button at the top of your calendar now, or wait for Google to auto-upgrade your bCal starting on January 15, 2018.
Check out Calendar resources to learn more: