Events Calendar is a fully functional schedule that allows users to add, edit, and manage their appointments. By default, the Events Calendar uses an offline data source, so you can easily add this extender control to your page without additional configuration.
C1EventCalendarExtender Markup
The following markup creates a C1EventsCalendarExtender control. Set the TargetControlID property to attach the extender to a control.
<cc1:C1EventsCalendarExtender ID="Panel1_C1EventsCalendarExtender"
runat="server" Colors="red,darkorchid,green,blue,cornflowerblue,yellow,bronze"
SelectedDate="2012-02-09" TargetControlID="Panel1"
VisibleCalendars="Default,Home,Work">
</cc1:C1EventsCalendarExtender>