Android Question Add Months To Date

DateTime.DateFormat ="dd-MM-yyyy"
    Log("Next date: " & DateTime.Date(DateTime.Add(DateTime.DateParse("01-04-2023"), 0,3,0)))  'Next date: 01-07-2023
    
    Dim p As Period
    p.Months = 3
    Dim nextdate As Long = DateUtils.AddPeriod(DateTime.DateParse("01-04-2023"), p)
    Log("Next date: " & DateTime.Date(nextdate))   'Next date: 01-07-2023
    
    Dim p As Period
    p.Months = 3
    Dim nextdate As Long = DateUtils.AddPeriod(DateTime.DateParse("01-04-2023"), p)
    Log($"Next date: $Date{nextdate}"$)   ' Next date: 01-07-2023

DateTime.DateFormat = "dd/MM/yyyy"
Dim strDate As String = "01/06/2023"
Log(strDate)
Dim lngDate As Long = DateTime.DateParse(strDate)
Dim lngLaterDate As Long = DateTime.Add(lngDate,0,3,0)
Dim strLaterDate As String = DateTime.Date(lngLaterDate)
Log(strLaterDate)

DateTime.DateFormat = "dd/MM/yyyy"
Log(DateTime.Date(DateTime.Add(DateTime.DateParse("01/04/2023"),0,3,0)))