Hi there I have a slight problem and I don't know how to do it.

I have these 3 columns in:

Column A (January to December in a sequence) around 170 cells

Column G has a calendar that pops up and displays dates (format dd/mm/
yyyy)
(this is only filled in if actions are required)

Column H that has dates in it in same dd/mm/yy format (only filled in
automatically if they have filled in information in another cell in
the same row)

What I need it to do is if cells in column G & H are blank then it
keeps the
cells going in the same sequence down as it is already (but as Jan-07
format
for example)

If column G has input e.g. 31/04/07 then it changes column A to the
following month e.g. May-07.

And if column H has been filled in then it will change the date in A
to a
year after the date it originally had e.g. May-07 will become May-08.

G will always take precedence over H if both are filled in.

Any help with this would be greatly appreciated as I am a complete
novice at
the moment.

Put the following in the code module for the worksheet. You said Col H
is filled in as a result of entry in another column. If so, you will
need to change the 2nd half to use the appropriate column/offsets.

Private Sub Worksheet_Change(ByVal Target As Range)

If Target.Column = 7 Then 'col G
Target.Offset(0, -6) = DateAdd("m", 1, Target)
End If
If Target.Column = 8 Then 'col H
If IsEmpty(Target.Offset(0, -1)) Then
Target.Offset(0, -7) = DateAdd("yyyy", 1, Target)
Else
Target.Offset(0, -7) = DateAdd("m", 1, Target.Offset(0, -1))
End If
End If
End Sub

Hth,
Merjet