>>11468450 Vitamin D Levels During Pregnancy Linked with Child IQ
Yes, and personality and likelihood of schizophrenia later in life.
The time of the year when you're born affects your personality through the level of vitamin D deficiency during your prenatal brain development. If you were born in March or April, your brain developed mostly over the winter, with maximum vitamin D deficiency in the northern hemisphere.
March madness, April fools.
Astrology wasn't all just superstition. A lot of it was based on observation.