Julie Andrews, Kate Winslet, the late Bernie Mac and Nicky Hilton all share Oct. 5 birthdays.
The least common American birthday falls on Leap Day, Feb. 29. When the number of Leap Day birthdays is multiplied by four, however, the result falls within the average range.
Christmas Day is the next least frequent birthday. While you often hear complaints by people maintaining that their birthdays were spoiled by being too close to Christmas, very few people are actually born on Christmas Day. Admittedly, getting birthday presents wrapped in holiday paper, “Merry Birthday” cards and the notorious “twofer” — one gift for both occasions, sounds like a raw deal.
While some women, consciously or unconsciously, may be able to delay the onset of labor, the low numbers of births on holidays may also be due to how hospitals and doctors arrange their schedules.
According to a study by the Yale School of Public Health, positive and negative associations with specific holidays may also influence birthrates. This study shows a significant decrease in regular and cesarean births on Halloween, compared to the number of births one week before and one week after the holiday. On Valentine’s Day, however, there is a small but noticeable increase in regular births and an even larger increase in cesareans.
The typical American birthday follows a fairly rigidly defined social script. Among the standard elements are: The birthday party or family celebration with ice cream and cake; singing the Happy Birthday song; blowing out the candles on the cake; making a birthday wish (but keeping it secret); getting a birthday spanking (one for each year, one to grow on, and a pinch to grow an inch); and receiving gifts and birthday cards. “Happy Birthday to You” is the most recognized song in the English language. It comes from a children’s song written and composed by Louisville sisters Patty and Mildred Hill in 1893.