'Dim ws As Worksheet
'Dim Target As Range, rng As Range
Set ws = Worksheets("Sheet1")
Set Target = ActiveCell
With ws
If Not Intersect(Target, .Columns(1)) Is Nothing Then
On Error GoTo bm_Safe_Exit
Application.EnableEvents = False
For Each rng In Intersect(Target, .Columns(1))
rng.Offset(0, 4) = Now
Next rng
End If
End With
bm_Safe_Exit: