Попробуйте заменить эту часть
With Worksheets("PdNitrateMassBalance").Range("A5:N600")
RS("start_date") = Format(RS("start_date"), "dd/mm/yyyy")
.ClearContents
.CopyFromRecordset RS
End With
На эту
With Worksheets("PdNitrateMassBalance")
With .Range("A5:N600")
.ClearContents
.CopyFromRecordset RS
End With
FixDatesFromYYYY_MM_DD .Range("A:A"), "dd/mm/yyyy"
End With
и дополнительную подпрограмму:
Sub FixDatesFromYYYY_MM_DD(DatesRange As Range, Format As String)
Dim r As Range
Dim firstDash As Integer, secondDash As Integer, i As Integer
For Each r In DatesRange
If Not r.Value = "" Then
firstDash = 0
secondDash = 0
For i = 1 To Len(r.Text)
If Mid(r.Text, i, 1) = "-" Then
If Not firstDash = 0 Then
secondDash = i
Exit For
Else
firstDash = i
End If
End If
Next
With r
.Value = DateSerial(Left(r.Text, 4), Mid(r.Text, firstDash + 1, IIf(secondDash = 7, 1, 2)), Mid(r.Text, secondDash + 1))
.NumberFormat = Format
End With
End If
Next
End Sub
Обновление
Добавлена подпрограмма для преобразования дат из текстового формата "гггг-мм-дд".