Dave failed 4 times. Can you open the ring box?

Leo locked the engagement ring box. Dinner is at 8. Best man Dave has the box, not the code, and he failed 4 times:

1) 256 (Leo's ex's birthday, 25/6. Bold move, Dave.)
Nothing is correct.

2) 214 (Valentine's Day, 14/2. So original, Dave.)
Two digits correct, both in the wrong place.

3) 247 (How often Leo talks about her: 24/7.)
One digit correct and well placed.

4) 365 (Days Leo has been "about to propose".)
One digit correct but in the wrong place.

Enter the 3-digit code before 8:00. 💍