October in the birth records
October accounts for 5,302,865 births, or 8.53% of the 62,187,024 records in the SSA 2000–2014 sample. Within this month, October 3 is the most common date, ranked #33 nationally. October 31 has the fewest total records and ranks #355. The table above includes all 31 dates, not just those two extremes.
What makes this month worth a closer look
October’s table makes it possible to compare Halloween with the days around it. October 31 is culturally distinctive, but the calculator measures birth frequency, not how unusual the birthday feels to its owner. Its result uses precisely the same denominator as October 1 or October 15.
The fifteen-year average also mixes weekdays. A calendar date is not always a Monday, a weekend or a holiday-observed day. The source includes weekdays, but this table groups only month and day to answer the birthday question. It should not be read as a controlled test of superstition or scheduling. The methodology describes that grouping and its limits.
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.