Happy birthday, or is it?

A nursery rhyme it may be, but scientists are discovering that our birth date predicts more about our future health and happiness than we imagine.
Researchers reporting in a recent issue of the journal, JAMA Neurology, say that spring babies, born in May, can have significantly lower levels of vitamin D and, consequently, a higher risk of developing multiple sclerosis than babies born in November. But do the month and season of our birth reveal anything else?