{
  "contest": {
    "id": "cq-ww-ssb",
    "name": "CQ Worldwide DX Contest, SSB",
    "sponsor": "CQ Magazine",
    "sponsor_home": "https://cqww.com/",
    "country": "US",
    "summary": "The largest amateur radio contest in the world. 48 hours of phone on six HF bands, working the 40 CQ zones and DXCC countries as multipliers, counted once per band.",
    "modes": [
      "SSB"
    ],
    "bands": [
      "160m",
      "80m",
      "40m",
      "20m",
      "15m",
      "10m"
    ],
    "exchange": "RS report plus CQ Zone number of the station location",
    "power_categories": [
      {
        "name": "High Power",
        "max_watts": 1500
      },
      {
        "name": "Low Power",
        "max_watts": 100
      },
      {
        "name": "QRP",
        "max_watts": 5
      }
    ],
    "log_format": "Cabrillo",
    "log_deadline_days": 5,
    "log_submit_url": "https://cqww.com/logs.htm",
    "timezone": "",
    "local_rolling": false,
    "eligibility": {
      "scope": "worldwide",
      "verified": true,
      "note": "CQ WW rules I: 'For amateurs around the world to contact as many other amateurs in as many CQ zones and countries as possible.'"
    },
    "active_from": null,
    "active_until": null,
    "note": "CQ has not published 2026 CQ WW rules: cqww.com/rules.htm still serves the 2025 rules and cqww.com/rules/2026_rules_cqww.pdf is a 404. log_deadline_days is the 5 days those 2025 rules state; CQ WPX, CQ WPX RTTY and CQ WW RTTY all moved to 48 hours for 2026, so recheck this when the 2026 rules appear.",
    "verified": true,
    "rules_url": "https://cqww.com/rules.htm",
    "rules_url_pattern": "",
    "rules_url_archived": "",
    "rules_url_checked": "2026-08-16",
    "source_note": "cqww.com states the period ('Starts 00:00:00 UTC Saturday Ends 23:59:59 UTC Sunday') and the year's dates but no recurrence rule. Last full weekend of October reproduces all ten CQ-published SSB runnings 2016-2025, each read from that year's archived rules PDF on cqww.com, including 2020 (Oct 24-25, not the Oct 31 last Saturday). Verified 2026-08-16."
  },
  "rule": {
    "plain": "Last full weekend of October",
    "raw": {
      "type": "nth_full_weekend",
      "month": 10,
      "n": -1
    },
    "start": {
      "day_offset": 0,
      "time": "0000"
    },
    "end": {
      "day_offset": 1,
      "time": "2359"
    },
    "sessions": null
  },
  "next": [
    {
      "contest_id": "cq-ww-ssb",
      "name": "CQ Worldwide DX Contest, SSB",
      "start": "2026-10-24T00:00:00Z",
      "end": "2026-10-25T23:59:00Z",
      "start_wall": null,
      "end_wall": null,
      "local_rolling": false,
      "timezone": "",
      "duration_hours": 47.98,
      "modes": [
        "SSB"
      ],
      "submodes": [],
      "bands": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "bands_note": "Six bands only: 1.8, 3.5, 7, 14, 21 and 28 MHz",
      "sponsor": "CQ Magazine",
      "rules_url": "https://cqww.com/rules.htm",
      "verified": true,
      "note": "CQ has not published 2026 CQ WW rules: cqww.com/rules.htm still serves the 2025 rules and cqww.com/rules/2026_rules_cqww.pdf is a 404. log_deadline_days is the 5 days those 2025 rules state; CQ WPX, CQ WPX RTTY and CQ WW RTTY all moved to 48 hours for 2026, so recheck this when the 2026 rules appear.",
      "exchange": "RS report plus CQ Zone number of the station location",
      "country": "US",
      "rules_url_archived": "",
      "rules_url_checked": "2026-08-16",
      "can_enter": true,
      "eligibility_scope": "worldwide",
      "eligibility_reason": "",
      "works": "everyone",
      "practical": "",
      "log_due": "2026-10-30T23:59:00Z",
      "uid": "cq-ww-ssb-20261024T0000@contestcal",
      "start_date": "2026-10-24",
      "mode_families": [
        "SSB"
      ],
      "band_families": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "duration_bucket": "gte24"
    },
    {
      "contest_id": "cq-ww-ssb",
      "name": "CQ Worldwide DX Contest, SSB",
      "start": "2027-10-30T00:00:00Z",
      "end": "2027-10-31T23:59:00Z",
      "start_wall": null,
      "end_wall": null,
      "local_rolling": false,
      "timezone": "",
      "duration_hours": 47.98,
      "modes": [
        "SSB"
      ],
      "submodes": [],
      "bands": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "bands_note": "Six bands only: 1.8, 3.5, 7, 14, 21 and 28 MHz",
      "sponsor": "CQ Magazine",
      "rules_url": "https://cqww.com/rules.htm",
      "verified": true,
      "note": "CQ has not published 2026 CQ WW rules: cqww.com/rules.htm still serves the 2025 rules and cqww.com/rules/2026_rules_cqww.pdf is a 404. log_deadline_days is the 5 days those 2025 rules state; CQ WPX, CQ WPX RTTY and CQ WW RTTY all moved to 48 hours for 2026, so recheck this when the 2026 rules appear.",
      "exchange": "RS report plus CQ Zone number of the station location",
      "country": "US",
      "rules_url_archived": "",
      "rules_url_checked": "2026-08-16",
      "can_enter": true,
      "eligibility_scope": "worldwide",
      "eligibility_reason": "",
      "works": "everyone",
      "practical": "",
      "log_due": "2027-11-05T23:59:00Z",
      "uid": "cq-ww-ssb-20271030T0000@contestcal",
      "start_date": "2027-10-30",
      "mode_families": [
        "SSB"
      ],
      "band_families": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "duration_bucket": "gte24"
    },
    {
      "contest_id": "cq-ww-ssb",
      "name": "CQ Worldwide DX Contest, SSB",
      "start": "2028-10-28T00:00:00Z",
      "end": "2028-10-29T23:59:00Z",
      "start_wall": null,
      "end_wall": null,
      "local_rolling": false,
      "timezone": "",
      "duration_hours": 47.98,
      "modes": [
        "SSB"
      ],
      "submodes": [],
      "bands": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "bands_note": "Six bands only: 1.8, 3.5, 7, 14, 21 and 28 MHz",
      "sponsor": "CQ Magazine",
      "rules_url": "https://cqww.com/rules.htm",
      "verified": true,
      "note": "CQ has not published 2026 CQ WW rules: cqww.com/rules.htm still serves the 2025 rules and cqww.com/rules/2026_rules_cqww.pdf is a 404. log_deadline_days is the 5 days those 2025 rules state; CQ WPX, CQ WPX RTTY and CQ WW RTTY all moved to 48 hours for 2026, so recheck this when the 2026 rules appear.",
      "exchange": "RS report plus CQ Zone number of the station location",
      "country": "US",
      "rules_url_archived": "",
      "rules_url_checked": "2026-08-16",
      "can_enter": true,
      "eligibility_scope": "worldwide",
      "eligibility_reason": "",
      "works": "everyone",
      "practical": "",
      "log_due": "2028-11-03T23:59:00Z",
      "uid": "cq-ww-ssb-20281028T0000@contestcal",
      "start_date": "2028-10-28",
      "mode_families": [
        "SSB"
      ],
      "band_families": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "duration_bucket": "gte24"
    },
    {
      "contest_id": "cq-ww-ssb",
      "name": "CQ Worldwide DX Contest, SSB",
      "start": "2029-10-27T00:00:00Z",
      "end": "2029-10-28T23:59:00Z",
      "start_wall": null,
      "end_wall": null,
      "local_rolling": false,
      "timezone": "",
      "duration_hours": 47.98,
      "modes": [
        "SSB"
      ],
      "submodes": [],
      "bands": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "bands_note": "Six bands only: 1.8, 3.5, 7, 14, 21 and 28 MHz",
      "sponsor": "CQ Magazine",
      "rules_url": "https://cqww.com/rules.htm",
      "verified": true,
      "note": "CQ has not published 2026 CQ WW rules: cqww.com/rules.htm still serves the 2025 rules and cqww.com/rules/2026_rules_cqww.pdf is a 404. log_deadline_days is the 5 days those 2025 rules state; CQ WPX, CQ WPX RTTY and CQ WW RTTY all moved to 48 hours for 2026, so recheck this when the 2026 rules appear.",
      "exchange": "RS report plus CQ Zone number of the station location",
      "country": "US",
      "rules_url_archived": "",
      "rules_url_checked": "2026-08-16",
      "can_enter": true,
      "eligibility_scope": "worldwide",
      "eligibility_reason": "",
      "works": "everyone",
      "practical": "",
      "log_due": "2029-11-02T23:59:00Z",
      "uid": "cq-ww-ssb-20291027T0000@contestcal",
      "start_date": "2029-10-27",
      "mode_families": [
        "SSB"
      ],
      "band_families": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "duration_bucket": "gte24"
    },
    {
      "contest_id": "cq-ww-ssb",
      "name": "CQ Worldwide DX Contest, SSB",
      "start": "2030-10-26T00:00:00Z",
      "end": "2030-10-27T23:59:00Z",
      "start_wall": null,
      "end_wall": null,
      "local_rolling": false,
      "timezone": "",
      "duration_hours": 47.98,
      "modes": [
        "SSB"
      ],
      "submodes": [],
      "bands": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "bands_note": "Six bands only: 1.8, 3.5, 7, 14, 21 and 28 MHz",
      "sponsor": "CQ Magazine",
      "rules_url": "https://cqww.com/rules.htm",
      "verified": true,
      "note": "CQ has not published 2026 CQ WW rules: cqww.com/rules.htm still serves the 2025 rules and cqww.com/rules/2026_rules_cqww.pdf is a 404. log_deadline_days is the 5 days those 2025 rules state; CQ WPX, CQ WPX RTTY and CQ WW RTTY all moved to 48 hours for 2026, so recheck this when the 2026 rules appear.",
      "exchange": "RS report plus CQ Zone number of the station location",
      "country": "US",
      "rules_url_archived": "",
      "rules_url_checked": "2026-08-16",
      "can_enter": true,
      "eligibility_scope": "worldwide",
      "eligibility_reason": "",
      "works": "everyone",
      "practical": "",
      "log_due": "2030-11-01T23:59:00Z",
      "uid": "cq-ww-ssb-20301026T0000@contestcal",
      "start_date": "2030-10-26",
      "mode_families": [
        "SSB"
      ],
      "band_families": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "duration_bucket": "gte24"
    }
  ]
}