Excel Formula Help

[andyGTBristol]

Hello, I have a spreadsheet in Excel 2010 with due dates in column L, what formula could I use in column M to display an alert when the date is past due / no date is entered.

ie due date in cell L4 is 23/02/16 - Cell M4 shows overdue ?

This is probably glaringly simple but I jest can't get my head round it today.

[Ellipsis]

In M4:

=IF(TODAY()>L4,"Overdue","")