Setting intervals of minutes
By default, the time picker displays minutes from 0 through 59. To restrict the time selections available to users, you can configure your application to display intervals of minutes on time controls, instead.
This setting is ignored if the Use native control on mobile option is selected.
Click the control, and then click the View properties icon.
On the Presentation tab of the Properties panel, select the Allow time to be displayed in the interval of minutes option and click the corresponding number of minutes: 5, 10, 15, 20, or 30.
ArticleDate time (calendar) control
ArticleAdding actions to a control