{
  "contest": {
    "id": "tenten-winter-phone",
    "name": "10-10 International Winter QSO Party (Phone)",
    "sponsor": "10-10 International Net",
    "sponsor_home": "https://www.ten-ten.org/",
    "country": "US",
    "summary": "Weekend phone party confined to 10 metres, scoring double for contacts with 10-10 members.",
    "modes": [
      "SSB"
    ],
    "bands": [
      "10m"
    ],
    "exchange": "Call sign + name + 10-10 number + QTH (state, province or country). Record 0 if the other station has no 10-10 number.",
    "power_categories": [
      {
        "name": "QRP",
        "max_watts": 10
      },
      {
        "name": "Low Power",
        "max_watts": 150
      },
      {
        "name": "High Power",
        "max_watts": null
      }
    ],
    "log_format": "",
    "log_deadline_days": null,
    "log_submit_url": "",
    "timezone": "",
    "local_rolling": false,
    "eligibility": {
      "scope": "worldwide",
      "verified": true,
      "practical": "Anyone may take part, but only members' logs are scored: 'logs will be accepted only from active members as of the date of the event ... Other logs received will be handled as check logs.'",
      "note": "10-10 rule 5.2.1: 'QSO Parties are open to all amateurs with operating privileges on the 10 meter band'. The membership requirement bites at log submission, not at participation, so this is a practical constraint rather than an entry bar."
    },
    "active_from": null,
    "active_until": null,
    "note": "The rules give the close as 2359 UTC Sunday; the schedule page says 'close at 2400 UTC on the second listed date'. One minute apart. Encoded as 2359 from the rules document, which is the authoritative text.",
    "verified": true,
    "rules_url": "https://www.ten-ten.org/index.php/activity/qso-party-rules",
    "rules_url_pattern": "",
    "rules_url_archived": "",
    "rules_url_checked": "2026-08-12",
    "source_note": "ten-ten.org QSO Party Rules 5.2.2: 'Winter Phone - held on the first full weekend in February - 0001 UTC Saturday through 2359 UTC Sunday.' 10-10's schedule page independently gives 'February 7-8, 2026'."
  },
  "rule": {
    "plain": "First full weekend of February",
    "raw": {
      "type": "nth_full_weekend",
      "month": 2,
      "n": 1
    },
    "start": {
      "day_offset": 0,
      "time": "0001"
    },
    "end": {
      "day_offset": 1,
      "time": "2359"
    },
    "sessions": null
  },
  "next": [
    {
      "contest_id": "tenten-winter-phone",
      "name": "10-10 International Winter QSO Party (Phone)",
      "start": "2027-02-06T00:01:00Z",
      "end": "2027-02-07T23:59:00Z",
      "start_wall": null,
      "end_wall": null,
      "local_rolling": false,
      "timezone": "",
      "duration_hours": 47.97,
      "modes": [
        "SSB"
      ],
      "submodes": [],
      "bands": [
        "10m"
      ],
      "bands_note": "",
      "sponsor": "10-10 International Net",
      "rules_url": "https://www.ten-ten.org/index.php/activity/qso-party-rules",
      "verified": true,
      "note": "The rules give the close as 2359 UTC Sunday; the schedule page says 'close at 2400 UTC on the second listed date'. One minute apart. Encoded as 2359 from the rules document, which is the authoritative text.",
      "exchange": "Call sign + name + 10-10 number + QTH (state, province or country). Record 0 if the other station has no 10-10 number.",
      "country": "US",
      "rules_url_archived": "",
      "rules_url_checked": "2026-08-12",
      "can_enter": true,
      "eligibility_scope": "worldwide",
      "eligibility_reason": "",
      "works": "everyone",
      "practical": "Anyone may take part, but only members' logs are scored: 'logs will be accepted only from active members as of the date of the event ... Other logs received will be handled as check logs.'",
      "log_due": null,
      "uid": "tenten-winter-phone-20270206T0001@contestcal",
      "start_date": "2027-02-06",
      "mode_families": [
        "SSB"
      ],
      "band_families": [
        "10m"
      ],
      "duration_bucket": "gte24"
    },
    {
      "contest_id": "tenten-winter-phone",
      "name": "10-10 International Winter QSO Party (Phone)",
      "start": "2028-02-05T00:01:00Z",
      "end": "2028-02-06T23:59:00Z",
      "start_wall": null,
      "end_wall": null,
      "local_rolling": false,
      "timezone": "",
      "duration_hours": 47.97,
      "modes": [
        "SSB"
      ],
      "submodes": [],
      "bands": [
        "10m"
      ],
      "bands_note": "",
      "sponsor": "10-10 International Net",
      "rules_url": "https://www.ten-ten.org/index.php/activity/qso-party-rules",
      "verified": true,
      "note": "The rules give the close as 2359 UTC Sunday; the schedule page says 'close at 2400 UTC on the second listed date'. One minute apart. Encoded as 2359 from the rules document, which is the authoritative text.",
      "exchange": "Call sign + name + 10-10 number + QTH (state, province or country). Record 0 if the other station has no 10-10 number.",
      "country": "US",
      "rules_url_archived": "",
      "rules_url_checked": "2026-08-12",
      "can_enter": true,
      "eligibility_scope": "worldwide",
      "eligibility_reason": "",
      "works": "everyone",
      "practical": "Anyone may take part, but only members' logs are scored: 'logs will be accepted only from active members as of the date of the event ... Other logs received will be handled as check logs.'",
      "log_due": null,
      "uid": "tenten-winter-phone-20280205T0001@contestcal",
      "start_date": "2028-02-05",
      "mode_families": [
        "SSB"
      ],
      "band_families": [
        "10m"
      ],
      "duration_bucket": "gte24"
    },
    {
      "contest_id": "tenten-winter-phone",
      "name": "10-10 International Winter QSO Party (Phone)",
      "start": "2029-02-03T00:01:00Z",
      "end": "2029-02-04T23:59:00Z",
      "start_wall": null,
      "end_wall": null,
      "local_rolling": false,
      "timezone": "",
      "duration_hours": 47.97,
      "modes": [
        "SSB"
      ],
      "submodes": [],
      "bands": [
        "10m"
      ],
      "bands_note": "",
      "sponsor": "10-10 International Net",
      "rules_url": "https://www.ten-ten.org/index.php/activity/qso-party-rules",
      "verified": true,
      "note": "The rules give the close as 2359 UTC Sunday; the schedule page says 'close at 2400 UTC on the second listed date'. One minute apart. Encoded as 2359 from the rules document, which is the authoritative text.",
      "exchange": "Call sign + name + 10-10 number + QTH (state, province or country). Record 0 if the other station has no 10-10 number.",
      "country": "US",
      "rules_url_archived": "",
      "rules_url_checked": "2026-08-12",
      "can_enter": true,
      "eligibility_scope": "worldwide",
      "eligibility_reason": "",
      "works": "everyone",
      "practical": "Anyone may take part, but only members' logs are scored: 'logs will be accepted only from active members as of the date of the event ... Other logs received will be handled as check logs.'",
      "log_due": null,
      "uid": "tenten-winter-phone-20290203T0001@contestcal",
      "start_date": "2029-02-03",
      "mode_families": [
        "SSB"
      ],
      "band_families": [
        "10m"
      ],
      "duration_bucket": "gte24"
    },
    {
      "contest_id": "tenten-winter-phone",
      "name": "10-10 International Winter QSO Party (Phone)",
      "start": "2030-02-02T00:01:00Z",
      "end": "2030-02-03T23:59:00Z",
      "start_wall": null,
      "end_wall": null,
      "local_rolling": false,
      "timezone": "",
      "duration_hours": 47.97,
      "modes": [
        "SSB"
      ],
      "submodes": [],
      "bands": [
        "10m"
      ],
      "bands_note": "",
      "sponsor": "10-10 International Net",
      "rules_url": "https://www.ten-ten.org/index.php/activity/qso-party-rules",
      "verified": true,
      "note": "The rules give the close as 2359 UTC Sunday; the schedule page says 'close at 2400 UTC on the second listed date'. One minute apart. Encoded as 2359 from the rules document, which is the authoritative text.",
      "exchange": "Call sign + name + 10-10 number + QTH (state, province or country). Record 0 if the other station has no 10-10 number.",
      "country": "US",
      "rules_url_archived": "",
      "rules_url_checked": "2026-08-12",
      "can_enter": true,
      "eligibility_scope": "worldwide",
      "eligibility_reason": "",
      "works": "everyone",
      "practical": "Anyone may take part, but only members' logs are scored: 'logs will be accepted only from active members as of the date of the event ... Other logs received will be handled as check logs.'",
      "log_due": null,
      "uid": "tenten-winter-phone-20300202T0001@contestcal",
      "start_date": "2030-02-02",
      "mode_families": [
        "SSB"
      ],
      "band_families": [
        "10m"
      ],
      "duration_bucket": "gte24"
    }
  ]
}