If you think a bunch of babies are conceived on Valentine's Day, you'd be correct, but shockingly it's ranked just 6th overall as a baby conception date. Would New Year's Eve be your second guess? Not bad, but NYE is raked 2nd behind what really might shock you! Christmas Day is the #1 Day for conceiving a baby. Helen Fisher, a biological anthropologist says, “There’s no question about it: It’s a very festive time of year, and that drives up the dopamine system, which drives up the testosterone system, which is linked with a time of higher sex drive.” See the full list of the most popular holidays to conceive a baby, as reported by Yahoo, here.