When logging into the Clarity New UX (Modern UX), the Timesheets icon is not displayed. Timesheets are displayed in Classic UI, but no one can access to the Timesheets from New UX.
Release : 15.9.1
If the Timesheets setting for the New UX is not activated, the Timesheets icon is not displayed in New UX.
You can activate the Timesheets for New UX as per below.