On a computer, Calendar's Agenda, Day and Month buttons, the arrows and Today now stay at the top of the page, under the page bar, while you scroll through Day view's hours. The page bar also stays in view on Calendar. On a phone the buttons scroll with the page, and Back returns from Day view.
Calendar view buttons stay in view
On a computer, the Agenda, Day and Month buttons now stay at the top of Calendar while you scroll through the day.