Hello,

Thank you for your post. I have been looking into it and I suggest you define your DateTime Field like this:

<igDP:Field Name="Date">
    <igDP:Field.Settings>
        <igDP:FieldSettings GroupByMode="OutlookDate">
            <igDP:FieldSettings.GroupByRecordPresenterStyle>
                <Style TargetType="{x:Type igDP:GroupByRecordPresenter}">
                    <EventSetter Event="Loaded" Handler="GBRPLoaded"/>
                </Style>
            </igDP:FieldSettings.GroupByRecordPresenterStyle>
        </igDP:FieldSettings>
    </igDP:Field.Settings>
</igDP:Field>

And add the following handler for the GroupByRecordPresenter’s Loaded event:

private void GBRPLoaded(object sender, RoutedEventArgs e)
{
    GroupByRecord record = ((sender as GroupByRecordPresenter).Record as GroupByRecord);

    if (record.ChildRecords.Count() == 1)
    {
        record.Description += " (" + record.ChildRecords.Count().ToString() + " item)";
    }
    else
        record.Description += " (" + record.ChildRecords.Count().ToString() + " items)";  
}

Please let me know if this helps you or you need further assistance on this matter.

Looking forward for your reply.

Hello,

I am just checking if you got this worked out or you still require any assistance or clarification on the matter.