{
  "schema_version": "1.0",
  "catalogue_updated": "2026-10-20",
  "canonical_url": "https://england-wales-birthday-calendar-2026.netlify.app/",
  "data_release_note": "Existing published data retained unchanged; catalogue date is not a data refresh. See source_release and source_status where present.",
  "license": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "ONS, NRS and NISRA; retain the source and definition for each series. Cite the explorer URL, filename, source period and access date.",
  "resources": [
    {
      "name": "England and Wales daily births, 1995\u20132025",
      "url": "https://england-wales-birthday-calendar-2026.netlify.app/daily_births_1995_2025.csv",
      "format": "text/csv",
      "columns": [
        "date",
        "year",
        "month",
        "day",
        "weekday_monday_0",
        "live_births",
        "source_id"
      ],
      "sha256": "364f0c0b925c14b9c5938a9ea2890667c48e2b261de81720fec7cc9ac8608401",
      "limitations": "Exact daily occurrence counts. Includes births to mothers usually resident elsewhere. Daily lookup is England and Wales only."
    },
    {
      "name": "England and Wales monthly births, 1938\u20132025",
      "url": "https://england-wales-birthday-calendar-2026.netlify.app/monthly_births_1938_2025.csv",
      "format": "text/csv",
      "columns": [
        "year",
        "month",
        "month_name",
        "monthly_births",
        "exact_monthly_births",
        "days_in_month",
        "births_per_day",
        "annual_births_from_months",
        "days_in_year",
        "annual_daily_mean",
        "seasonality_index",
        "count_precision",
        "source_id",
        "source_url",
        "provenance",
        "annual_control_births",
        "annual_control_difference",
        "geography",
        "measure"
      ],
      "sha256": "fe73f5d28ecd32afd7f062d1f80c612fd71f2654c0ae2ee68b77cbcdfae8a843",
      "limitations": "Occurrence counts normalised by calendar days; use the source and provenance columns."
    },
    {
      "name": "UK monthly birth series",
      "url": "https://england-wales-birthday-calendar-2026.netlify.app/uk_monthly_births.csv",
      "format": "text/csv",
      "columns": [
        "geography",
        "year",
        "month",
        "monthly_births",
        "days_in_month",
        "births_per_day",
        "annual_births",
        "annual_daily_mean",
        "seasonality_index",
        "timing_basis",
        "geography_basis",
        "source_file",
        "source_url",
        "source_table",
        "source_release",
        "source_status"
      ],
      "sha256": "1188c3925404edcf49339b2fa8a3c127831d6602dc1f43ca6cf5a4c7cb9136c5",
      "limitations": "Do not mix geography and timing bases. September 2008\u2013August 2009 is unsourced for the separate England/Wales residence series. 2025 is partial and provisional for that split. Charts use complete years."
    },
    {
      "name": "Monthly ONS reconciliation",
      "url": "https://england-wales-birthday-calendar-2026.netlify.app/ons_source_checks.csv",
      "format": "text/csv",
      "columns": [
        "year",
        "month",
        "england",
        "wales",
        "nonresidents",
        "ons_extract_total",
        "master_total",
        "difference",
        "status"
      ],
      "sha256": "951afb45b360dc5e1ac763a770e6cdddbf385847af6421dff0023e066ddad5a7",
      "limitations": "Recorded differences between official source extracts; counts have not been rescaled."
    },
    {
      "name": "Annual ONS reconciliation",
      "url": "https://england-wales-birthday-calendar-2026.netlify.app/ons_annual_checks.csv",
      "format": "text/csv",
      "columns": [
        "geography",
        "year",
        "source_month_sum",
        "table_6_annual_births",
        "difference",
        "difference_percent",
        "control_file",
        "control_table"
      ],
      "sha256": "c969b289f1a03029486043c80f4012df3570667d1af4693f59b89c25bd4669d6",
      "limitations": "Annual country checks against source controls."
    }
  ]
}