Displaying week numbers in calendar widgets

If users are accustomed to seeing week numbers in calendars, you can specify that the week numbers are displayed along the left side of the calendar widget in your application. The week numbers are shown according to the ISO 8601 standard date notation. Week numbers may vary, depending on locale.

Before you begin:  In the layout of the form that you are editing Adding a DateTime control to a layout.
This setting is ignored if the Use native control on mobile option is selected.
On the Presentation tab of the Properties panel, select the Display week numbers on the calendar option.