Someone please help!!!

I cannot for the life of me figure out how to insert dates in any format
where the year will not automatically attach itself. Im making a database of
historical data and only the Month and day is important, I don't want the
year. I need to be able to sort it by month and day regardless of what year
it was, the only thing I could do was enter Aug.15 for example (with period
in between Aug and 15) but then it sorted alphabetically

can anyone help?

thanks so much

Erich