Sister in law told me something...true?

Jessi • Pregnant with baby #2! We're having a boy and beyond excited! I'm not thrilled that we are in alaska tho. From California and I hate the cold.
Ok so my sister in law surprised us tonight and came over for dinner uninvited. Good thing I made a lot. Anyways I told her tye baby has been head down since 18 weeks. She told me he will come earlier than our due date. Is that just an old wives tale or true????