How do I enable the calendar view in Microsoft Planner?

This question arose from the November 2017 video. The screen shot is from a plan I created by visiting https://tasks.office.com and signing in with my Office 365 corporate account. I circled the Schedule tab, which provides various calendar-oriented views, including the one shown. If you don't see the Schedule tab when you visit https://tasks.office.com, then this feature has most likely not been deployed into your Office 365 tenant yet.