Ajax Tool Kit Calendar Extender - Horário de Verão

    function CheckDate(sender, args) {
        var selectedDate = new Date();
        selectedDate = sender._selectedDate;
        if (selectedDate.getHours() == 23) {
            selectedDate.setHours(1);
            selectedDate.setDate(selectedDate.getDate() + 1);
            sender._selectedDate = selectedDate;                  
            sender._textbox.set_Value(sender._selectedDate.format(sender._format));
        }
    }

 

<cc1:CalendarExtender ID="CalendarExtender1" runat="server" TargetControlID="TextBox1"
            TodaysDateFormat="dd/MM/yyyy" Format="dd/MM/yyyy" ClearTime="true" OnClientDateSelectionChanged="CheckDate">
        </cc1:CalendarExtender>