{
  "contest": {
    "id": "rsgb-ssb-field-day",
    "name": "RSGB SSB Field Day",
    "sponsor": "RSGB Contest Committee",
    "sponsor_home": "https://www.rsgbcc.org/hf/",
    "country": "GB",
    "summary": "Twenty-four hours of portable SSB over the first September weekend, on five HF bands.",
    "modes": [
      "SSB"
    ],
    "bands": [
      "80m",
      "40m",
      "20m",
      "15m",
      "10m"
    ],
    "exchange": "RS(T) plus a serial number starting at 1 and incrementing by 1, irrespective of band.",
    "power_categories": [],
    "log_format": "",
    "log_deadline_days": null,
    "log_submit_url": "",
    "timezone": "",
    "local_rolling": false,
    "eligibility": {
      "scope": "entity_list",
      "entities": [
        "G"
      ],
      "verified": true,
      "note": "Shares the CW field day's rules page and its entrant clause: 'primarily intended for RSGB Members and Affiliated Societies', with non-members entering only through an Affiliated Society."
    },
    "active_from": null,
    "active_until": null,
    "note": "Two differences from the CW field day in June, both the sponsor's: it starts at 1300 rather than 1500, and it drops 160 m. Same rules page, same 24 hours. RSGB keeps a rules page per year, so its own dates check its own rule. Four years were read for this record -- 2023, 2024, 2025 and 2026 -- and the recurrence reproduces all of them.",
    "verified": true,
    "rules_url": "https://www.rsgbcc.org/hf/rules/2026/rnfd.shtml",
    "rules_url_pattern": "https://www.rsgbcc.org/hf/rules/{year}/rnfd.shtml",
    "rules_url_archived": "",
    "rules_url_checked": "2026-08-20",
    "source_note": "rsgbcc.org/hf/rules/2026/rnfd.shtml: 'SSB FD - Saturday 5 - Sunday 6 September 2026 1300-1300 UTC.' 'SSB FD - 80, 40, 20, 15, 10m - SSB only.' RSGB's own dates for four years: 2 Sep 2023, 7 Sep 2024, 6 Sep 2025 and 5 Sep 2026 -- the first Saturday of September each time."
  },
  "rule": {
    "plain": "First Saturday of September",
    "raw": {
      "type": "nth_weekday",
      "month": 9,
      "n": 1,
      "weekday": 5
    },
    "start": {
      "day_offset": 0,
      "time": "1300"
    },
    "end": {
      "day_offset": 1,
      "time": "1300"
    },
    "sessions": null
  },
  "next": [
    {
      "contest_id": "rsgb-ssb-field-day",
      "name": "RSGB SSB Field Day",
      "start": "2027-09-04T13:00:00Z",
      "end": "2027-09-05T13:00:00Z",
      "start_wall": null,
      "end_wall": null,
      "local_rolling": false,
      "timezone": "",
      "duration_hours": 24,
      "modes": [
        "SSB"
      ],
      "submodes": [],
      "bands": [
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "bands_note": "80, 40, 20, 15 and 10 m, SSB only -- no 160 m, unlike the CW field day.",
      "sponsor": "RSGB Contest Committee",
      "rules_url": "https://www.rsgbcc.org/hf/rules/2027/rnfd.shtml",
      "verified": true,
      "note": "Two differences from the CW field day in June, both the sponsor's: it starts at 1300 rather than 1500, and it drops 160 m. Same rules page, same 24 hours. RSGB keeps a rules page per year, so its own dates check its own rule. Four years were read for this record -- 2023, 2024, 2025 and 2026 -- and the recurrence reproduces all of them.",
      "exchange": "RS(T) plus a serial number starting at 1 and incrementing by 1, irrespective of band.",
      "country": "GB",
      "rules_url_archived": "",
      "rules_url_checked": "2026-08-20",
      "can_enter": false,
      "eligibility_scope": "entity_list",
      "eligibility_reason": "Entry limited to G. K stations may be worked but cannot submit an entry.",
      "works": "everyone",
      "practical": "",
      "log_due": null,
      "uid": "rsgb-ssb-field-day-20270904T1300@contestcal",
      "start_date": "2027-09-04",
      "mode_families": [
        "SSB"
      ],
      "band_families": [
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "duration_bucket": "gte24"
    },
    {
      "contest_id": "rsgb-ssb-field-day",
      "name": "RSGB SSB Field Day",
      "start": "2028-09-02T13:00:00Z",
      "end": "2028-09-03T13:00:00Z",
      "start_wall": null,
      "end_wall": null,
      "local_rolling": false,
      "timezone": "",
      "duration_hours": 24,
      "modes": [
        "SSB"
      ],
      "submodes": [],
      "bands": [
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "bands_note": "80, 40, 20, 15 and 10 m, SSB only -- no 160 m, unlike the CW field day.",
      "sponsor": "RSGB Contest Committee",
      "rules_url": "https://www.rsgbcc.org/hf/rules/2028/rnfd.shtml",
      "verified": true,
      "note": "Two differences from the CW field day in June, both the sponsor's: it starts at 1300 rather than 1500, and it drops 160 m. Same rules page, same 24 hours. RSGB keeps a rules page per year, so its own dates check its own rule. Four years were read for this record -- 2023, 2024, 2025 and 2026 -- and the recurrence reproduces all of them.",
      "exchange": "RS(T) plus a serial number starting at 1 and incrementing by 1, irrespective of band.",
      "country": "GB",
      "rules_url_archived": "",
      "rules_url_checked": "2026-08-20",
      "can_enter": false,
      "eligibility_scope": "entity_list",
      "eligibility_reason": "Entry limited to G. K stations may be worked but cannot submit an entry.",
      "works": "everyone",
      "practical": "",
      "log_due": null,
      "uid": "rsgb-ssb-field-day-20280902T1300@contestcal",
      "start_date": "2028-09-02",
      "mode_families": [
        "SSB"
      ],
      "band_families": [
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "duration_bucket": "gte24"
    },
    {
      "contest_id": "rsgb-ssb-field-day",
      "name": "RSGB SSB Field Day",
      "start": "2029-09-01T13:00:00Z",
      "end": "2029-09-02T13:00:00Z",
      "start_wall": null,
      "end_wall": null,
      "local_rolling": false,
      "timezone": "",
      "duration_hours": 24,
      "modes": [
        "SSB"
      ],
      "submodes": [],
      "bands": [
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "bands_note": "80, 40, 20, 15 and 10 m, SSB only -- no 160 m, unlike the CW field day.",
      "sponsor": "RSGB Contest Committee",
      "rules_url": "https://www.rsgbcc.org/hf/rules/2029/rnfd.shtml",
      "verified": true,
      "note": "Two differences from the CW field day in June, both the sponsor's: it starts at 1300 rather than 1500, and it drops 160 m. Same rules page, same 24 hours. RSGB keeps a rules page per year, so its own dates check its own rule. Four years were read for this record -- 2023, 2024, 2025 and 2026 -- and the recurrence reproduces all of them.",
      "exchange": "RS(T) plus a serial number starting at 1 and incrementing by 1, irrespective of band.",
      "country": "GB",
      "rules_url_archived": "",
      "rules_url_checked": "2026-08-20",
      "can_enter": false,
      "eligibility_scope": "entity_list",
      "eligibility_reason": "Entry limited to G. K stations may be worked but cannot submit an entry.",
      "works": "everyone",
      "practical": "",
      "log_due": null,
      "uid": "rsgb-ssb-field-day-20290901T1300@contestcal",
      "start_date": "2029-09-01",
      "mode_families": [
        "SSB"
      ],
      "band_families": [
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "duration_bucket": "gte24"
    },
    {
      "contest_id": "rsgb-ssb-field-day",
      "name": "RSGB SSB Field Day",
      "start": "2030-09-07T13:00:00Z",
      "end": "2030-09-08T13:00:00Z",
      "start_wall": null,
      "end_wall": null,
      "local_rolling": false,
      "timezone": "",
      "duration_hours": 24,
      "modes": [
        "SSB"
      ],
      "submodes": [],
      "bands": [
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "bands_note": "80, 40, 20, 15 and 10 m, SSB only -- no 160 m, unlike the CW field day.",
      "sponsor": "RSGB Contest Committee",
      "rules_url": "https://www.rsgbcc.org/hf/rules/2030/rnfd.shtml",
      "verified": true,
      "note": "Two differences from the CW field day in June, both the sponsor's: it starts at 1300 rather than 1500, and it drops 160 m. Same rules page, same 24 hours. RSGB keeps a rules page per year, so its own dates check its own rule. Four years were read for this record -- 2023, 2024, 2025 and 2026 -- and the recurrence reproduces all of them.",
      "exchange": "RS(T) plus a serial number starting at 1 and incrementing by 1, irrespective of band.",
      "country": "GB",
      "rules_url_archived": "",
      "rules_url_checked": "2026-08-20",
      "can_enter": false,
      "eligibility_scope": "entity_list",
      "eligibility_reason": "Entry limited to G. K stations may be worked but cannot submit an entry.",
      "works": "everyone",
      "practical": "",
      "log_due": null,
      "uid": "rsgb-ssb-field-day-20300907T1300@contestcal",
      "start_date": "2030-09-07",
      "mode_families": [
        "SSB"
      ],
      "band_families": [
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "duration_bucket": "gte24"
    }
  ]
}