Fawn births have been documented during almost every month of the year. Nature gets around to trying everything. That's how Natural Selection works--it uses (and needs) the random variations of Nature to select against, and just about every aspect of a species will display some random variation.
"Know where you stand, and stand there" --Jesuit Father Daniel Berrigan
"There is no reasoning someone out of a position he has not reasoned himself into." --Clive James