June in the birth records
June accounts for 5,163,360 births, or 8.30% of the 62,187,024 records in the SSA 2000–2014 sample. Within this month, June 27 is the most common date, ranked #49 nationally. June 9 has the fewest total records and ranks #249. The table above includes all 30 dates, not just those two extremes.
What makes this month worth a closer look
June is one of the four 30-day months. Its rows let you compare a late-spring or early-summer birthday without mixing in the extra day that July has. Every June date occurs fifteen times here, so the births-per-occurrence column gives an average across the same number of observations.
The source ends in 2014. In particular, it cannot measure changes associated with Juneteenth becoming a U.S. federal holiday in 2021. A June 19 result describes the historical period printed beside it. This is why the date range belongs on a share card, not just in a footnote. For the next fixed summer holiday in these records, compare July 4.
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.