Use event code

Option Explicit

Private Sub Worksheet_Change(ByVal Target As Range)
Const WS_RANGE As String = "D3" '<== change to suit

On Error GoTo ws_exit
Application.EnableEvents = False

If Not Intersect(Target, Me.Range(WS_RANGE)) Is Nothing Then
With Target
If .Value = "R" Then
.Offset(0, 1).Value = Date
.Offset(0, 1).NumberFormat = "dd mmm yyyy"
End If
End With
End If

ws_exit:
Application.EnableEvents = True
End Sub

'This is worksheet event code, which means that it needs to be
'placed in the appropriate worksheet code module, not a standard
'code module. To do this, right-click on the sheet tab, select
'the View Code option from the menu, and paste the code in.


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HTH

Bob

(there's no email, no snail mail, but somewhere should be gmail in my addy)



"The new guy" <The new wrote in message
...
I am trying to have the date of input marked for a cell in another location
using an "IF" Function. The only problem is that when I open the sheet the
next day, it updates the date and does not solve my problem.

=IF(D3="R", TODAY(), "NA")

Any other options besides TODAY() that will help? I need it to only change
when data in the referenced cell is changed, not every time I open excel.