{
  "contest": {
    "id": "rsgb-ft4-activity-day",
    "name": "RSGB FT4 International Activity Day",
    "sponsor": "RSGB Contest Committee",
    "sponsor_home": "https://www.rsgbcc.org/hf/",
    "country": "GB",
    "summary": "Twenty-four hours of FT4 across six HF bands in April, with sections for UK and overseas entrants at 100 and 10 watts.",
    "modes": [
      "FT8/FT4"
    ],
    "bands": [
      "160m",
      "80m",
      "40m",
      "20m",
      "15m",
      "10m"
    ],
    "exchange": "A signal report. A serial number is not required.",
    "power_categories": [],
    "log_format": "",
    "log_deadline_days": null,
    "log_submit_url": "",
    "timezone": "",
    "local_rolling": false,
    "eligibility": {
      "scope": "worldwide",
      "verified": true,
      "note": "The sections are 'UK 100W OPEN', 'UK 100W RESTRICTED', 'UK 10W RESTRICTED' and non-UK equivalents, so overseas entrants have sections of their own. The contest's name says International."
    },
    "active_from": null,
    "active_until": null,
    "note": "MANUAL, BECAUSE THE ONE PATTERN THAT FITS THREE YEARS BREAKS IN THE FOURTH. RSGB ran this on the FIRST Saturday of April in 2023, 2024 and 2025 -- and on the SECOND in 2026. So no ordinal describes it, and the record holds only the date RSGB published.\n\nThere is a plausible reason, and it is a hypothesis rather than a rule: Easter Sunday fell on 5 April 2026, which would put the first Saturday of April on Easter Saturday. Easter fell outside early April in the other three years. If RSGB confirms it avoids Easter, this becomes a rule with an exception; until then it is one year's deviation with a story attached, and a story is not a source.\n\nThe format also changed: 2023 was a single 12-hour day at 0800-2000 UTC, and from 2024 it has been 24 hours at 1200-1200.",
    "verified": false,
    "rules_url": "https://www.rsgbcc.org/hf/rules/2026/rallband_ft4.shtml",
    "rules_url_pattern": "https://www.rsgbcc.org/hf/rules/{year}/rallband_ft4.shtml",
    "rules_url_archived": "",
    "rules_url_checked": "2026-08-20",
    "source_note": "rsgbcc.org/hf/rules/2026/rallband_ft4.shtml, 'RSGB FT4 International Activity Day': 'Saturday 11 April - 12 April 2026: 1200-1200 UTC.' Mode: 'Standard FT4 format will be used as implemented in WSJT-X V2.6.1 or later.' Bands: '160m, 80m, 40m, 20m, 15m and 10m.' Exchange: '(a) Signal report is required (b) Serial number is NOT required.' Sections split UK&CD and non-UK&CD at 100 W and 10 W. RSGB's own dates for four years: 1 Apr 2023 (0800-2000 UTC, a single 12-hour day), 6-7 Apr 2024, 5-6 Apr 2025 and 11-12 Apr 2026, all 1200-1200 UTC from 2024."
  },
  "rule": {
    "plain": "Dates set by the sponsor each year (no derivable rule)",
    "raw": {
      "type": "manual",
      "dates": {
        "2026": [
          "2026-04-11"
        ]
      }
    },
    "start": {
      "day_offset": 0,
      "time": "1200"
    },
    "end": {
      "day_offset": 1,
      "time": "1200"
    },
    "sessions": null
  },
  "next": []
}