In message , Graham P Davis
writes
I've long wondered whether the time of year on which you are born might
have an impact. Would a baby born in mid-summer be more prone to
depression due to decreasing daylight during the first six-months of
its life? Conversely, would a child born in mid-winter be a born
optimist?

I've sometimes wondered whether the impact of the weather on the mother
during pregnancy might have some ongoing influence on how her baby
develops mentally and physically. In particular, the mother's diet at
different seasons of the year is likely to differ slightly. (And that
was even more true in the days before refrigeration and the large-scale
importation of foodstuffs from around the globe.)

When the school year starts may also be a factor. I believe it's
accepted that those who are the youngest in their class are
disadvantaged compared to their older peers. at least for the first year
or two. However now that nursery education is far more common it may be
less of a factor, as there's no longer the sudden leap from no-school to
school at age five.
--
John Hall
"Hegel was right when he said that we learn from history
that man can never learn anything from history."
George Bernard Shaw (1856-1950)