Compare Dates in two excel sheets

Hello Everybody,
I want to compare the date between two excel sheets. In sheet 1 i have only the start date and end date, in sheet2 i have start date and end date (monthly basis). I want that the date of sheet 1 must be compare with the date of sheet 2.
For the sake of example workbook is attached with this thread.

Thanks for your help

I also have written some vba macro, but it is not completely working,

Sub Calculator()
        Dim Cover As Worksheet
        Set Cover = Worksheets("Sheet1")
        Cover.Activate
        
        With Cover
            iyear = Year(Range("F15")) & Month(Range("f5"))
            iyeartill = Year(Range("F16")) & Month(Range("f16"))
            imonth = Month(Range("f15"))
        End With
        
        With Sheets("sheet2").Activate
            For counter = iyear To iyeartill Step imonth
             counter.Cells(69, 1) = "aa"
            Exit For
            Next counter
        End With
    
    End Sub