November in the birth records
November accounts for 5,008,750 births, or 8.05% of the 62,187,024 records in the SSA 2000–2014 sample. Within this month, November 21 is the most common date, ranked #47 nationally. November 23 has the fewest total records and ranks #359. The table above includes all 30 dates, not just those two extremes.
What makes this month worth a closer look
Thanksgiving moves across the late-November calendar rather than occupying one date every year. That matters when reading these rows: November 25 may be a holiday in one year and an ordinary date in another. Its average blends those years together. There is no single “Thanksgiving birthday” probability that applies to every November birthday.
Each November date still occurs fifteen times in the sample, so the table provides a consistent comparison of actual month-and-day birthdays. Contrast that moving holiday with December 25, whose calendar date is fixed. Both tables describe recorded births; neither alone explains an individual family’s choice, medical situation or delivery timing.
Read your row and make a card
Rank #1 is most common across all 366 dates. “1 in” divides all birth records by the records for that specific date; the daily-average column divides by the number of times the date occurred. A higher “rarer than” percentage means more other dates had higher counts. These are different ways of describing the same historical sample, not estimates of everyone alive today.
Select your date in the table to open the birthday calculator. Save a portrait or landscape result, or combine it with your name. The complete methodology and original FiveThirtyEight source stay available for anyone who wants to check the numbers.