How to auto enter today's date into cells

Hi everyone. I'm looking to set up a bunch of cells so that when data is put into them and you hit ENTER, today's date and a dash automatically appear before the text typed.

As an example, if I type "filed tax return" into a cell and hit ENTER, I want the cell to then say "March 9 - filed tax return"

I'm just looking for it to display the month and day (but not year), although if I could be shown how to do both (making it display just month and day, and also making it display month, day, and year) that would be great.