Halo Star 
When you say "calculate a meaning"....
am I to assume a connection?Whilst the Day Number is of physical importance,
denoting the basic physical composition of Each of Us,
the whole Blueprint helps denote
obvious syncronicities
and challenges in any relationship.
As I see the 6(15th) and 9 (18)
Dance
I see a perfect blend of Opposition
Uniting in polarized magnetism.
Venus and Mars
For Ever entranced and dismayed.
Think Yin and Yang.
Uni-Verses singing in complete Harmony
But on different Octaves.
The Whole Birthdate is preferable....
especially if you want to understand this "partner"
and how they contribute to your Lives
Together.
More data would help
if that doesn't answer your Quest-ion.
