Three members of the Orion High School boys' basketball team had the following conversation.

George: I just realized that our jersey numbers are all 2-digit primes.

Hannah: And the sum of your two jersey numbers is today's date.

Isaac: That's funny. The sum of your two jersey numbers is my birthday earlier this month.

George: And the sum of your two jersey numbers is my birthday later this month.

What number does Hannah wear?