Read about how to say the date
Checklist for success:
Learn the days of the week
Learn the months of the year
Learn the numbers 1-31
Days and months have a lower case letter in French (different from English where we use an upper case or capital letter).
In English we might say "the fifteenth of May"
In French we just say "le quinze mai"
You don't need the French equivalent of "th" or or