Glad you got the situation rectified.
For what it's worth, I think the root of the problem is actually in the CommandButton1_Click procedure of the ufPrograms userform.
Commenting out the second formatting line allowed everything to display dd/mm/yyyy as desired and on my machine and I have Regional Settings Short Date set as M/d/yyyy.
Code:
Private Sub CommandButton1_Click()
Me.pDate.Value = Format(CalendarForm.GetDate, "dd/mm/yyyy")
'Me.pDate.Value = Format(Me.pDate.Value, Text)
End Sub