Why Are so Many Babies Born around 8:00 A.M.? - Scientific American Blog Network
Based on the stories we share, it would be easy to imagine that when a baby is born is random. In the U.S., however, weeks in September have 5 to 10 percent more births than weeks in January. Twelve thousand babies are born on a typical Tuesday compared with 8,000 on a typical Saturday. Sixty percent of babies are born during the day, between 6 A.M. and 6 P.M. And, 3.5 times as many babies are born at exactly 8:00 A.M., the most common minute to be born, than at the least common, 3:09 A.M.
The graphic below (developed by Nadieh Bremer and me for the July 2017 Scientific American) reveals these regular birth patterns. It shows what minutes of the day, hours of the week and weeks of the year are more common or less common than average.