Week view on a 1080p screen should show at least 12 hours (e.g. from 0800 to 2000) on the screen
As a user I want to see all my working-day appointments on the screen at one point so I can see everything for today with nothing hidden. For many people with typical hours this is 0900-1700 for work; or 0700-2200 for family appointments before and after work.
Currently on my 1080p screen if I set the scroll to begin at 0700, the last appointment I can see without scrolling is 1330. This is not ideal to have an overview of my appointments through the day.