Hi Tiffany! :)

27 is one of my favorite numbers. :) It's the number of old souls, people who are quite sensitive, feel things very strongly. They are here as teachers, often undergoing their last incarnation here, or here to help someone learn something specific. Sometimes they are disguised as pawns or arch-enemies, evil stepsisters or really bad boyfriends, lovingly treating us like hell so we can experience something that will help us to learn and grow.

The 27/9 is a smart nine too, as the 7 denotes a love of studying life, sciences, reality, philosophy, religion, anthropology, archeology, anything esoteric.

It's interesting that nearly your entire family was born on the 27th day, that would indicate that you all planned very carefully to be in the same family this time around, and perhaps have been part of the same family in previous incarnations. Whole societies can choose to incarnate together for their life lessons and evolutionary process, such as the Tibetans. Families too. :)