Currently it is not possible to provide a selected date format template when the scheduler is shown in mobile "phone" mode.
It would be nice if this is configurable in the view: views: [
{
type: "day", minorTickCount: MinorTickCount,
selectedDateFormat: "{0:D}",
selectedDateFormatMobile: "{0:D}",
dateHeaderTemplate: kendo.template("<strong>#=kendo.toString(date, 'ddd d-M')#</strong>")
},
]