Are midi dresses okay for prom?

Excuse me, could you please clarify for me if midi dresses are considered appropriate attire for a prom event? I've been looking for a dress that strikes a balance between elegance and comfort, and a midi dress seems to fit that criteria. However, I'm unsure if it aligns with the traditional formality expected at a prom. Could you offer your expertise on whether midi dresses are generally accepted as suitable for such an occasion? Thank you in advance for your guidance.