Hi there Billie,

you have to handle RowDataBound event

-- aspx page --

<asp:GridView runat="server" ID="gridView"
            AutoGenerateColumns="true"
            OnRowDataBound="gridView_RowDataBound">

-- end aspx page --

-- code beside --

protected void gridView_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        DataRow row = ((DataRowView)e.Row.DataItem).Row;
       
        int index = GetDateColumnIndex(row);

        e.Row.Cells[index].Text = ((DateTime)
            row[index]).ToString("dd/MM/yyyyyyyy-MM-dd");
    }
}

private int dateColumnIndex = -1;
private int GetDateColumnIndex(DataRow row)
{
    if (this.dateColumnIndex == -1)
    {
        this.dateColumnIndex =
            row.Table.Columns.IndexOf("ItemRecieved");
           
        if (dateColumnIndex < 0)
        {
            throw new Exception(
                "datasource does not contain the MyDateColumn column");
        }
    }
    return this.dateColumnIndex;
}

-- end code beside --

Hope this helps