There is not really a pattern here, out of 37 we cover every month of the year only slightly unevenly. Too bad, a pattern would have been fun.
I'm very glad you didn't get into celestial signs. They are sweet, but they're for the birds.......
How about childhood spent in: city, town, village, on farm, by sea, near forest, in mountains, near industry, near river, by lake etc. etc.? Probably no obvious pattern there either.

birte