If your workflow uses the calendar scheduling method, users can access their calendars directly from the mobile app by tapping on the Calendar time on the home screen.  Note: Timesheets and other actuals are entered to the projects via the app home screen.

Users will be able to see their assigned and scheduled tasks in a calendar view.   You can scroll through the schedule and toggle between Day, Week and Month views as required.

Tapping on event will display further details, which you can then edit to rechedule or delete by tapping the icons in the top right corner.

Editing the task lets you change the dates to reschedule, and add calendar specific information (Label/Status etc).   Tap the tick icon in the top right to save changes.