Hi,

I'm writing a trigger to create an event whenever a campaign member is created, but I've hit an issue I don't understand.

This is the trigger:

trigger CreateEventforCampaignMember on CampaignMember (after insert) {

    // 1. create a list of events
    List <Event> eventsToInsert = new List <Event>();
    
    User usr = [SELECT Id FROM User WHERE FirstName =: 'Mark' AND LastName =: 'Alger' AND IsActive = TRUE LIMIT 1];
    // This is to ensure that all events belong to Mark.
    
    // 2. for every campaign member being inserted, add to the list of events (this is so that the trigger can handle bulk inserts)
    for (CampaignMember cm : trigger.new) {
        eventsToInsert.add(
                            new Event    (
                                            EndDateTime = cm.End_Date_of_Event__c,
                                            IsPrivate = false,
                                            IsRecurrence = false,
                                            IsReminderSet = false,
                                            OwnerID = usr.Id,
                                            ActivityDate = cm.Date_of_Event__c,
                                            StartDateTime = cm.Date_of_Event__c,
                                            Subject = cm.Subject__c,
                                            WhoID = cm.LeadId
                                        )
        );
    }
    
    // 3. insert the list of events
    insert eventsToInsert;
}

This is the error I get when I try to save the trigger:

Error: Compile Error: Invalid initial expression type for field Event.ActivityDate, expecting: Date at line 18 column 60

Any help would be very much appreciated!