# Duplicate entries based on start and end date

#### rubbis_with_excel

##### New Member
Hi,
I have some data with start and end dates, and I need to build some VBA to duplicate lines so there are month-specific entries. Hopefully this example *might* explain it

If the raw data looks like this:
<b>Name___Start Date___End Date</b>
Person1__01/01/2019___31/03/2019
Person2__10/10/2019___11/11/2019

I want to be able to convert it to:
<b>Name___Start Date___End Date</b>
Person1__01/01/2019___31/01/2019
Person1__01/02/2019___28/02/2019
Person1__01/03/2019___31/03/2019
Person2__10/10/2019___31/10/2019
Person2__01/11/2019___11/11/2019

So that each month is represented on a different row.

I've been racking my brains for hours and I just can't get it to work!

If anyone has any ideas, I would be very grateful.

Thanks

#### Joe4

Try this (I added lots of documentation so hopefully you can see how it works):
Code:
``````Sub MyInsertRows()

Dim r As Long
Dim dteStart As Date
Dim dteEnd As Date
Dim dteEOM As Date
Dim nm As String

Application.ScreenUpdating = False

'   Specify first row data appears on
r = 2

'   Loop through all records
Do Until Cells(r, "B") = ""
'       Get current values
nm = Cells(r, "A")
dteStart = Cells(r, "B")
dteEnd = Cells(r, "C")
'       Calculate end of month date from start date
dteEOM = DateSerial(Year(dteStart), Month(dteStart) + 1, 0)
'       Check to see if current end date greater than end of month date
If dteEnd > dteEOM Then
'           Insert record and update dates
Rows(r + 1).Insert
'           Update End date on current record
Cells(r, "C") = dteEOM
'           Add values for new record
Cells(r + 1, "A") = nm
Cells(r + 1, "B") = dteEOM + 1
Cells(r + 1, "C") = dteEnd
End If
'       Increment row counter
r = r + 1
Loop

Application.ScreenUpdating = True

End Sub``````
Note that I am assuming your data is in columns A, B, and C, and the header row is row 1 and the data starts on row 2.

#### rubbis_with_excel

##### New Member
That is GENIUS.

Thank you so much, that is absolutely perfect!!!

#### Joe4

You are welcome.
Glad I was able to help!

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