{
  "contest": {
    "id": "cq-wpx-cw",
    "name": "CQ WW WPX Contest, CW",
    "sponsor": "CQ Magazine",
    "sponsor_home": "https://cqwpx.com/",
    "country": "US",
    "summary": "Worldwide CW contest scored on prefixes worked: every different callsign prefix counts once, on any band, so the multiplier grows all weekend rather than saturating.",
    "modes": [
      "CW"
    ],
    "bands": [
      "160m",
      "80m",
      "40m",
      "20m",
      "15m",
      "10m"
    ],
    "exchange": "RS(T) report plus a progressive contact serial number starting with 001",
    "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": 2,
    "log_submit_url": "https://cqwpx.com/logs.htm",
    "timezone": "",
    "local_rolling": false,
    "eligibility": {
      "scope": "worldwide",
      "verified": true,
      "note": "CQ WPX rules I: 'For amateurs worldwide to contact as many amateurs and prefixes as possible during the contest period.'"
    },
    "active_from": null,
    "active_until": null,
    "note": "",
    "verified": true,
    "rules_url": "https://cqwpx.com/rules/",
    "rules_url_pattern": "",
    "rules_url_archived": "",
    "rules_url_checked": "2026-08-16",
    "source_note": "CQ's own wording, from the 2016 WPX rules PDF archived on cqwpx.com: 'Each contest mode is a separate event running from 0000 UTC Saturday until 2359 UTC Sunday. SSB is the last full weekend of March and CW is the last full weekend of May.' CQ dropped that sentence after 2016 and now publishes only each year's dates, but the rule still reproduces all eleven CQ-published CW runnings 2016-2026, including 2025 (May 24-25, not the May 31 last Saturday). Verified 2026-08-16."
  },
  "rule": {
    "plain": "Last full weekend of May",
    "raw": {
      "type": "nth_full_weekend",
      "month": 5,
      "n": -1
    },
    "start": {
      "day_offset": 0,
      "time": "0000"
    },
    "end": {
      "day_offset": 1,
      "time": "2359"
    },
    "sessions": null
  },
  "next": [
    {
      "contest_id": "cq-wpx-cw",
      "name": "CQ WW WPX Contest, CW",
      "start": "2027-05-29T00:00:00Z",
      "end": "2027-05-30T23:59:00Z",
      "start_wall": null,
      "end_wall": null,
      "local_rolling": false,
      "timezone": "",
      "duration_hours": 47.98,
      "modes": [
        "CW"
      ],
      "submodes": [],
      "bands": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "bands_note": "Only the 1.8, 3.5, 7, 14, 21, and 28 MHz bands may be used",
      "sponsor": "CQ Magazine",
      "rules_url": "https://cqwpx.com/rules/",
      "verified": true,
      "note": "",
      "exchange": "RS(T) report plus a progressive contact serial number starting with 001",
      "country": "US",
      "rules_url_archived": "",
      "rules_url_checked": "2026-08-16",
      "can_enter": true,
      "eligibility_scope": "worldwide",
      "eligibility_reason": "",
      "works": "everyone",
      "practical": "",
      "log_due": "2027-06-01T23:59:00Z",
      "uid": "cq-wpx-cw-20270529T0000@contestcal",
      "start_date": "2027-05-29",
      "mode_families": [
        "CW"
      ],
      "band_families": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "duration_bucket": "gte24"
    },
    {
      "contest_id": "cq-wpx-cw",
      "name": "CQ WW WPX Contest, CW",
      "start": "2028-05-27T00:00:00Z",
      "end": "2028-05-28T23:59:00Z",
      "start_wall": null,
      "end_wall": null,
      "local_rolling": false,
      "timezone": "",
      "duration_hours": 47.98,
      "modes": [
        "CW"
      ],
      "submodes": [],
      "bands": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "bands_note": "Only the 1.8, 3.5, 7, 14, 21, and 28 MHz bands may be used",
      "sponsor": "CQ Magazine",
      "rules_url": "https://cqwpx.com/rules/",
      "verified": true,
      "note": "",
      "exchange": "RS(T) report plus a progressive contact serial number starting with 001",
      "country": "US",
      "rules_url_archived": "",
      "rules_url_checked": "2026-08-16",
      "can_enter": true,
      "eligibility_scope": "worldwide",
      "eligibility_reason": "",
      "works": "everyone",
      "practical": "",
      "log_due": "2028-05-30T23:59:00Z",
      "uid": "cq-wpx-cw-20280527T0000@contestcal",
      "start_date": "2028-05-27",
      "mode_families": [
        "CW"
      ],
      "band_families": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "duration_bucket": "gte24"
    },
    {
      "contest_id": "cq-wpx-cw",
      "name": "CQ WW WPX Contest, CW",
      "start": "2029-05-26T00:00:00Z",
      "end": "2029-05-27T23:59:00Z",
      "start_wall": null,
      "end_wall": null,
      "local_rolling": false,
      "timezone": "",
      "duration_hours": 47.98,
      "modes": [
        "CW"
      ],
      "submodes": [],
      "bands": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "bands_note": "Only the 1.8, 3.5, 7, 14, 21, and 28 MHz bands may be used",
      "sponsor": "CQ Magazine",
      "rules_url": "https://cqwpx.com/rules/",
      "verified": true,
      "note": "",
      "exchange": "RS(T) report plus a progressive contact serial number starting with 001",
      "country": "US",
      "rules_url_archived": "",
      "rules_url_checked": "2026-08-16",
      "can_enter": true,
      "eligibility_scope": "worldwide",
      "eligibility_reason": "",
      "works": "everyone",
      "practical": "",
      "log_due": "2029-05-29T23:59:00Z",
      "uid": "cq-wpx-cw-20290526T0000@contestcal",
      "start_date": "2029-05-26",
      "mode_families": [
        "CW"
      ],
      "band_families": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "duration_bucket": "gte24"
    },
    {
      "contest_id": "cq-wpx-cw",
      "name": "CQ WW WPX Contest, CW",
      "start": "2030-05-25T00:00:00Z",
      "end": "2030-05-26T23:59:00Z",
      "start_wall": null,
      "end_wall": null,
      "local_rolling": false,
      "timezone": "",
      "duration_hours": 47.98,
      "modes": [
        "CW"
      ],
      "submodes": [],
      "bands": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "bands_note": "Only the 1.8, 3.5, 7, 14, 21, and 28 MHz bands may be used",
      "sponsor": "CQ Magazine",
      "rules_url": "https://cqwpx.com/rules/",
      "verified": true,
      "note": "",
      "exchange": "RS(T) report plus a progressive contact serial number starting with 001",
      "country": "US",
      "rules_url_archived": "",
      "rules_url_checked": "2026-08-16",
      "can_enter": true,
      "eligibility_scope": "worldwide",
      "eligibility_reason": "",
      "works": "everyone",
      "practical": "",
      "log_due": "2030-05-28T23:59:00Z",
      "uid": "cq-wpx-cw-20300525T0000@contestcal",
      "start_date": "2030-05-25",
      "mode_families": [
        "CW"
      ],
      "band_families": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "duration_bucket": "gte24"
    }
  ]
}