I need a macro that will automatically name the sheet tab the date that I
enter in cell E4 on my worksheet. I tried the following macro:

Sub Worksheet_Change ()
ws.Name = ws.Range("E4").Value
End Sub

It automatically runs when I enter a new date in cell E4, which is good.
What isn't good is that it gives the following error message:

"Compile error: Procedure declaration does not match description of event or
procedure having the same name."

How can I get this macro to work?