Delegate using in ASPX Page and user control

In ASPX Page :

public partial class Activity_ContactActivity : Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        MonthActivity1.LoadWeekTabInformation += new UserControls_Activity_MonthActivity.LoadTabInformation(MonthActivity1_LoadWeekTabInformation);
    }

    void MonthActivity1_LoadWeekTabInformation()
    {
        this.ActivityDate = MonthActivity1.ActivityDate;
        this.CurrentActivityTab = enumContactActivityTab.Week;
        LoadActivityInformation();
    }
}

In User Control Page :

public partial class UserControls_Activity_MonthActivity : UserControl
{
    public delegate void LoadTabInformation();
    public event LoadTabInformation LoadWeekTabInformation;

    private void DisplayWeekTabInformation()
    {
        LoadWeekTabInformation();
    }
}