Map date fields to iCalendar variables You can specify what fields provide the date information in calendar invitation notifications by changing the field mappings of the dtstart and dtend variables in the import export map for the iCalendar invitation. Before you beginRole required: admin Procedure In the navigation filter, enter sys_impex_map.list. Open the icalendar.change_request map or the map you want to edit. In the Field Maps related list, click either the end_date or start_date mapped field to change the mapping for dtstart or dtend, as needed. Change the Database field to the field you want to use to set the start date or end date. Click Update.