{
  "contest": {
    "id": "cq-wpx-ssb",
    "name": "CQ WW WPX Contest, SSB",
    "sponsor": "CQ Magazine",
    "sponsor_home": "https://cqwpx.com/",
    "country": "US",
    "summary": "Worldwide phone contest scored on prefixes worked: every different callsign prefix counts once, on any band, so the multiplier grows all weekend rather than saturating.",
    "modes": [
      "SSB"
    ],
    "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": "cqwpx.com's 2026 header reads 'SSB: March 28-29, 2025'; the year is a typo in CQ's own page. March 28-29 is a Saturday/Sunday pair only in 2026, and the same page's 2026 log deadline (2359 UTC 31 March 2026) confirms the 2026 weekend.",
    "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 SSB runnings 2016-2026. Verified 2026-08-16."
  },
  "rule": {
    "plain": "Last full weekend of March",
    "raw": {
      "type": "nth_full_weekend",
      "month": 3,
      "n": -1
    },
    "start": {
      "day_offset": 0,
      "time": "0000"
    },
    "end": {
      "day_offset": 1,
      "time": "2359"
    },
    "sessions": null
  },
  "next": [
    {
      "contest_id": "cq-wpx-ssb",
      "name": "CQ WW WPX Contest, SSB",
      "start": "2027-03-27T00:00:00Z",
      "end": "2027-03-28T23:59:00Z",
      "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": "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": "cqwpx.com's 2026 header reads 'SSB: March 28-29, 2025'; the year is a typo in CQ's own page. March 28-29 is a Saturday/Sunday pair only in 2026, and the same page's 2026 log deadline (2359 UTC 31 March 2026) confirms the 2026 weekend.",
      "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": "2027-03-30T23:59:00Z",
      "uid": "cq-wpx-ssb-20270327T0000@contestcal",
      "start_date": "2027-03-27",
      "mode_families": [
        "SSB"
      ],
      "band_families": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "duration_bucket": "gte24"
    },
    {
      "contest_id": "cq-wpx-ssb",
      "name": "CQ WW WPX Contest, SSB",
      "start": "2028-03-25T00:00:00Z",
      "end": "2028-03-26T23:59:00Z",
      "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": "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": "cqwpx.com's 2026 header reads 'SSB: March 28-29, 2025'; the year is a typo in CQ's own page. March 28-29 is a Saturday/Sunday pair only in 2026, and the same page's 2026 log deadline (2359 UTC 31 March 2026) confirms the 2026 weekend.",
      "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": "2028-03-28T23:59:00Z",
      "uid": "cq-wpx-ssb-20280325T0000@contestcal",
      "start_date": "2028-03-25",
      "mode_families": [
        "SSB"
      ],
      "band_families": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "duration_bucket": "gte24"
    },
    {
      "contest_id": "cq-wpx-ssb",
      "name": "CQ WW WPX Contest, SSB",
      "start": "2029-03-24T00:00:00Z",
      "end": "2029-03-25T23:59:00Z",
      "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": "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": "cqwpx.com's 2026 header reads 'SSB: March 28-29, 2025'; the year is a typo in CQ's own page. March 28-29 is a Saturday/Sunday pair only in 2026, and the same page's 2026 log deadline (2359 UTC 31 March 2026) confirms the 2026 weekend.",
      "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": "2029-03-27T23:59:00Z",
      "uid": "cq-wpx-ssb-20290324T0000@contestcal",
      "start_date": "2029-03-24",
      "mode_families": [
        "SSB"
      ],
      "band_families": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "duration_bucket": "gte24"
    },
    {
      "contest_id": "cq-wpx-ssb",
      "name": "CQ WW WPX Contest, SSB",
      "start": "2030-03-30T00:00:00Z",
      "end": "2030-03-31T23:59:00Z",
      "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": "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": "cqwpx.com's 2026 header reads 'SSB: March 28-29, 2025'; the year is a typo in CQ's own page. March 28-29 is a Saturday/Sunday pair only in 2026, and the same page's 2026 log deadline (2359 UTC 31 March 2026) confirms the 2026 weekend.",
      "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": "2030-04-02T23:59:00Z",
      "uid": "cq-wpx-ssb-20300330T0000@contestcal",
      "start_date": "2030-03-30",
      "mode_families": [
        "SSB"
      ],
      "band_families": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m"
      ],
      "duration_bucket": "gte24"
    }
  ]
}