.UICalendarControl {
    margin: 10px 0;
}
.UICalendarControl .Header {
    background: #2196f3;
    height: 30px;
    width: 250px;
}
.UICalendarControl .Header > span {
    color: #ffffff;
    display: inline-block;
    font: bold 10pt/30px arial;
    padding-left: 15px;
    text-transform: uppercase;
}
.UICalendarControl .RadCalendar.RadCalendar_Windows7 {
}