{
  "name": "February 29 births against the same weekday, U.S., 1996–2012",
  "desc": "For each leap year in the two daily U.S. birth series, births on February 29, the average births on the other days of that year with the same weekday, the ratio of the two, and the ratio to the average of all days.",
  "lic": "CC BY 4.0",
  "lic_url": "https://creativecommons.org/licenses/by/4.0/",
  "by": "The Yardstick Almanac",
  "url": "https://theyardstickalmanac.com/scale/leap-day-birthdays/",
  "from": [
    "FiveThirtyEight data repository, births/: US_births_1994-2003_CDC_NCHS.csv (CDC National Center for Health Statistics) and US_births_2000-2014_SSA.csv (Social Security Administration), CC BY 4.0"
  ],
  "how": "Compiled by The Yardstick Almanac from the data listed",
  "data_by": [
    "U.S. daily births 1994–2003 (CDC NCHS) and 2000–2014 (SSA) from the FiveThirtyEight data repository, CC BY 4.0 (adapted: birth ratios computed); computed 2026-11-01, CC BY 4.0"
  ]
}