{
  "name": "Weekdays are not evenly shared",
  "desc": "How often the 13th of a month and February 29 fall on each weekday in one 400-year Gregorian cycle (2001–2400); any full cycle gives the same counts.",
  "lic": "CC BY 4.0",
  "lic_url": "https://creativecommons.org/licenses/by/4.0/",
  "by": "The Yardstick Almanac",
  "url": "https://theyardstickalmanac.com/calendars/gregorian-leap-year-rule/",
  "from": [
    "Gregorian and Julian leap-year rules, Explanatory Supplement to the Astronomical Almanac, ch. 15, sec. 15.4.2 and 15.3.5"
  ],
  "how": "Compiled by The Yardstick Almanac from the data listed",
  "data_by": [
    "Computed from the Gregorian and Julian leap-year rules (Explanatory Supplement to the Astronomical Almanac, ch. 15, sec. 15.4.2 and 15.3.5), 2026-11-01, CC BY 4.0"
  ]
}