Using New Outlook on Windows for personal email, calendar, and contact management
Diana, you are a goddess! Your suggestion to set Work hours and location for all 7 days resolved the jumping problem AND I was able to revert back to the standard 30 minute view - THANK YOU SO MUCH!
In case others see this...
From Calendar: Settings >Work hours and location > select all 7 days listed at top > set start hours to something other than 12:00 AM.