{
  "contest": {
    "id": "jarl-all-ja",
    "name": "ALL JA Contest",
    "sponsor": "JARL",
    "sponsor_home": "https://www.jarl.org/",
    "country": "JP",
    "summary": "Japan's biggest domestic contest: 24 hours from 2100 JST on the Saturday before the last Sunday in April, on seven HF bands plus 6 m.",
    "modes": [
      "CW",
      "SSB",
      "FM"
    ],
    "bands": [
      "160m",
      "80m",
      "40m",
      "20m",
      "15m",
      "10m",
      "6m"
    ],
    "exchange": "RST, the prefecture or region number for where you are operating, and one letter for power -- H above 100 W, M to 100 W, L to 10 W (20 W on 50 MHz), P at 5 W or less. Tokyo at 10 watts on phone sends 5910L.",
    "power_categories": [],
    "log_format": "",
    "log_deadline_days": null,
    "log_submit_url": "",
    "timezone": "Asia/Tokyo",
    "local_rolling": false,
    "eligibility": {
      "scope": "entity_list",
      "entities": [
        "JA"
      ],
      "verified": true,
      "note": "'2 参加資格 日本国内のアマチュア局およびSWL（アマチュア局の電波を受信する個人をいう）' -- amateur stations within Japan, and SWLs. All four of JARL's domestic contests carry the same clause. A JA station can be WORKED from anywhere, which is why the record exists; entry is the part that is restricted."
    },
    "active_from": null,
    "active_until": null,
    "note": "The rule is anchored on the LAST SUNDAY and counts backwards to the Saturday, which is how JARL writes it. Checked rather than assumed: that is the same date as 'the last full weekend of April' in every year, and always will be -- April's last Sunday falls on the 24th at the earliest, so the Saturday before it is never outside the month. JARL's wording is encoded because it is JARL's, not because it changes an answer. Contrast ACAG, where the equivalent choice moves the contest a full week in 2028 and 2029. Encoded as wall_clock in Asia/Tokyo because that is how JARL states it -- 21時00分（JST） -- rather than converted to a fixed UTC time by hand. Japan has not observed daylight saving since 1952, so the two are identical in practice and will stay so; the record says what the sponsor said and lets the engine do the arithmetic. log_deadline_days is absent. JARL prints a dated deadline above the rules for the edition in hand -- ALL JA 2026 is '提出締切日 2026年5月6日（水）必着' -- and the numbered 規約 clauses that follow state the dates, eligibility, bands, categories and exchange but no submission span. All four of JARL's 2026 deadlines happen to fall exactly ten days after their contest ends, which is suggestive and is not a rule JARL wrote. The same reasoning already keeps a deadline off JARL's All Asian records.",
    "verified": true,
    "rules_url": "https://www.jarl.org/Japanese/1_Tanoshimo/1-1_Contest/allja_rules.html",
    "rules_url_pattern": "",
    "rules_url_archived": "",
    "rules_url_checked": "2026-08-19",
    "source_note": "jarl.org, 第68回 ALL JAコンテスト規約: '1 開催日時 毎年4月の最終日曜日の前日の21時00分から最終日曜日の21時00分（JST）まで' -- from 21:00 on the day before the LAST SUNDAY of April each year until 21:00 on that Sunday. JARL states the 2026 running separately at the head of the same page: '2026年4月25日（土） 21時00分（JST）から4月26日（日）21時00分（JST）まで', and its results page for the 68th running gives '2026年4月25～26日'. The rule reproduces both."
  },
  "rule": {
    "plain": "Last Sunday of April",
    "raw": {
      "type": "nth_weekday",
      "month": 4,
      "n": -1,
      "weekday": 6
    },
    "start": {
      "day_offset": -1,
      "time": "2100",
      "wall_clock": true
    },
    "end": {
      "day_offset": 0,
      "time": "2100",
      "wall_clock": true
    },
    "sessions": null
  },
  "next": [
    {
      "contest_id": "jarl-all-ja",
      "name": "ALL JA Contest",
      "start": "2027-04-24T12:00:00Z",
      "end": "2027-04-25T12:00:00Z",
      "start_wall": "2027-04-24T21:00:00",
      "end_wall": "2027-04-25T21:00:00",
      "local_rolling": false,
      "timezone": "Asia/Tokyo",
      "duration_hours": 24,
      "modes": [
        "CW",
        "SSB",
        "FM"
      ],
      "submodes": [
        "AM"
      ],
      "bands": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m",
        "6m"
      ],
      "bands_note": "1.9, 3.5, 7, 14, 21, 28 and 50 MHz. The phone all-band category excludes 14 MHz; CW may use it. JARL's 電話 covers AM, SSB and FM, and 電信 is CW.",
      "sponsor": "JARL",
      "rules_url": "https://www.jarl.org/Japanese/1_Tanoshimo/1-1_Contest/allja_rules.html",
      "verified": true,
      "note": "The rule is anchored on the LAST SUNDAY and counts backwards to the Saturday, which is how JARL writes it. Checked rather than assumed: that is the same date as 'the last full weekend of April' in every year, and always will be -- April's last Sunday falls on the 24th at the earliest, so the Saturday before it is never outside the month. JARL's wording is encoded because it is JARL's, not because it changes an answer. Contrast ACAG, where the equivalent choice moves the contest a full week in 2028 and 2029. Encoded as wall_clock in Asia/Tokyo because that is how JARL states it -- 21時00分（JST） -- rather than converted to a fixed UTC time by hand. Japan has not observed daylight saving since 1952, so the two are identical in practice and will stay so; the record says what the sponsor said and lets the engine do the arithmetic. log_deadline_days is absent. JARL prints a dated deadline above the rules for the edition in hand -- ALL JA 2026 is '提出締切日 2026年5月6日（水）必着' -- and the numbered 規約 clauses that follow state the dates, eligibility, bands, categories and exchange but no submission span. All four of JARL's 2026 deadlines happen to fall exactly ten days after their contest ends, which is suggestive and is not a rule JARL wrote. The same reasoning already keeps a deadline off JARL's All Asian records.",
      "exchange": "RST, the prefecture or region number for where you are operating, and one letter for power -- H above 100 W, M to 100 W, L to 10 W (20 W on 50 MHz), P at 5 W or less. Tokyo at 10 watts on phone sends 5910L.",
      "country": "JP",
      "rules_url_archived": "",
      "rules_url_checked": "2026-08-19",
      "can_enter": false,
      "eligibility_scope": "entity_list",
      "eligibility_reason": "Entry limited to JA. K stations may be worked but cannot submit an entry.",
      "works": "everyone",
      "practical": "",
      "log_due": null,
      "uid": "jarl-all-ja-20270424T1200@contestcal",
      "start_date": "2027-04-24",
      "mode_families": [
        "CW",
        "SSB",
        "FM"
      ],
      "band_families": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m",
        "6m"
      ],
      "duration_bucket": "gte24"
    },
    {
      "contest_id": "jarl-all-ja",
      "name": "ALL JA Contest",
      "start": "2028-04-29T12:00:00Z",
      "end": "2028-04-30T12:00:00Z",
      "start_wall": "2028-04-29T21:00:00",
      "end_wall": "2028-04-30T21:00:00",
      "local_rolling": false,
      "timezone": "Asia/Tokyo",
      "duration_hours": 24,
      "modes": [
        "CW",
        "SSB",
        "FM"
      ],
      "submodes": [
        "AM"
      ],
      "bands": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m",
        "6m"
      ],
      "bands_note": "1.9, 3.5, 7, 14, 21, 28 and 50 MHz. The phone all-band category excludes 14 MHz; CW may use it. JARL's 電話 covers AM, SSB and FM, and 電信 is CW.",
      "sponsor": "JARL",
      "rules_url": "https://www.jarl.org/Japanese/1_Tanoshimo/1-1_Contest/allja_rules.html",
      "verified": true,
      "note": "The rule is anchored on the LAST SUNDAY and counts backwards to the Saturday, which is how JARL writes it. Checked rather than assumed: that is the same date as 'the last full weekend of April' in every year, and always will be -- April's last Sunday falls on the 24th at the earliest, so the Saturday before it is never outside the month. JARL's wording is encoded because it is JARL's, not because it changes an answer. Contrast ACAG, where the equivalent choice moves the contest a full week in 2028 and 2029. Encoded as wall_clock in Asia/Tokyo because that is how JARL states it -- 21時00分（JST） -- rather than converted to a fixed UTC time by hand. Japan has not observed daylight saving since 1952, so the two are identical in practice and will stay so; the record says what the sponsor said and lets the engine do the arithmetic. log_deadline_days is absent. JARL prints a dated deadline above the rules for the edition in hand -- ALL JA 2026 is '提出締切日 2026年5月6日（水）必着' -- and the numbered 規約 clauses that follow state the dates, eligibility, bands, categories and exchange but no submission span. All four of JARL's 2026 deadlines happen to fall exactly ten days after their contest ends, which is suggestive and is not a rule JARL wrote. The same reasoning already keeps a deadline off JARL's All Asian records.",
      "exchange": "RST, the prefecture or region number for where you are operating, and one letter for power -- H above 100 W, M to 100 W, L to 10 W (20 W on 50 MHz), P at 5 W or less. Tokyo at 10 watts on phone sends 5910L.",
      "country": "JP",
      "rules_url_archived": "",
      "rules_url_checked": "2026-08-19",
      "can_enter": false,
      "eligibility_scope": "entity_list",
      "eligibility_reason": "Entry limited to JA. K stations may be worked but cannot submit an entry.",
      "works": "everyone",
      "practical": "",
      "log_due": null,
      "uid": "jarl-all-ja-20280429T1200@contestcal",
      "start_date": "2028-04-29",
      "mode_families": [
        "CW",
        "SSB",
        "FM"
      ],
      "band_families": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m",
        "6m"
      ],
      "duration_bucket": "gte24"
    },
    {
      "contest_id": "jarl-all-ja",
      "name": "ALL JA Contest",
      "start": "2029-04-28T12:00:00Z",
      "end": "2029-04-29T12:00:00Z",
      "start_wall": "2029-04-28T21:00:00",
      "end_wall": "2029-04-29T21:00:00",
      "local_rolling": false,
      "timezone": "Asia/Tokyo",
      "duration_hours": 24,
      "modes": [
        "CW",
        "SSB",
        "FM"
      ],
      "submodes": [
        "AM"
      ],
      "bands": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m",
        "6m"
      ],
      "bands_note": "1.9, 3.5, 7, 14, 21, 28 and 50 MHz. The phone all-band category excludes 14 MHz; CW may use it. JARL's 電話 covers AM, SSB and FM, and 電信 is CW.",
      "sponsor": "JARL",
      "rules_url": "https://www.jarl.org/Japanese/1_Tanoshimo/1-1_Contest/allja_rules.html",
      "verified": true,
      "note": "The rule is anchored on the LAST SUNDAY and counts backwards to the Saturday, which is how JARL writes it. Checked rather than assumed: that is the same date as 'the last full weekend of April' in every year, and always will be -- April's last Sunday falls on the 24th at the earliest, so the Saturday before it is never outside the month. JARL's wording is encoded because it is JARL's, not because it changes an answer. Contrast ACAG, where the equivalent choice moves the contest a full week in 2028 and 2029. Encoded as wall_clock in Asia/Tokyo because that is how JARL states it -- 21時00分（JST） -- rather than converted to a fixed UTC time by hand. Japan has not observed daylight saving since 1952, so the two are identical in practice and will stay so; the record says what the sponsor said and lets the engine do the arithmetic. log_deadline_days is absent. JARL prints a dated deadline above the rules for the edition in hand -- ALL JA 2026 is '提出締切日 2026年5月6日（水）必着' -- and the numbered 規約 clauses that follow state the dates, eligibility, bands, categories and exchange but no submission span. All four of JARL's 2026 deadlines happen to fall exactly ten days after their contest ends, which is suggestive and is not a rule JARL wrote. The same reasoning already keeps a deadline off JARL's All Asian records.",
      "exchange": "RST, the prefecture or region number for where you are operating, and one letter for power -- H above 100 W, M to 100 W, L to 10 W (20 W on 50 MHz), P at 5 W or less. Tokyo at 10 watts on phone sends 5910L.",
      "country": "JP",
      "rules_url_archived": "",
      "rules_url_checked": "2026-08-19",
      "can_enter": false,
      "eligibility_scope": "entity_list",
      "eligibility_reason": "Entry limited to JA. K stations may be worked but cannot submit an entry.",
      "works": "everyone",
      "practical": "",
      "log_due": null,
      "uid": "jarl-all-ja-20290428T1200@contestcal",
      "start_date": "2029-04-28",
      "mode_families": [
        "CW",
        "SSB",
        "FM"
      ],
      "band_families": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m",
        "6m"
      ],
      "duration_bucket": "gte24"
    },
    {
      "contest_id": "jarl-all-ja",
      "name": "ALL JA Contest",
      "start": "2030-04-27T12:00:00Z",
      "end": "2030-04-28T12:00:00Z",
      "start_wall": "2030-04-27T21:00:00",
      "end_wall": "2030-04-28T21:00:00",
      "local_rolling": false,
      "timezone": "Asia/Tokyo",
      "duration_hours": 24,
      "modes": [
        "CW",
        "SSB",
        "FM"
      ],
      "submodes": [
        "AM"
      ],
      "bands": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m",
        "6m"
      ],
      "bands_note": "1.9, 3.5, 7, 14, 21, 28 and 50 MHz. The phone all-band category excludes 14 MHz; CW may use it. JARL's 電話 covers AM, SSB and FM, and 電信 is CW.",
      "sponsor": "JARL",
      "rules_url": "https://www.jarl.org/Japanese/1_Tanoshimo/1-1_Contest/allja_rules.html",
      "verified": true,
      "note": "The rule is anchored on the LAST SUNDAY and counts backwards to the Saturday, which is how JARL writes it. Checked rather than assumed: that is the same date as 'the last full weekend of April' in every year, and always will be -- April's last Sunday falls on the 24th at the earliest, so the Saturday before it is never outside the month. JARL's wording is encoded because it is JARL's, not because it changes an answer. Contrast ACAG, where the equivalent choice moves the contest a full week in 2028 and 2029. Encoded as wall_clock in Asia/Tokyo because that is how JARL states it -- 21時00分（JST） -- rather than converted to a fixed UTC time by hand. Japan has not observed daylight saving since 1952, so the two are identical in practice and will stay so; the record says what the sponsor said and lets the engine do the arithmetic. log_deadline_days is absent. JARL prints a dated deadline above the rules for the edition in hand -- ALL JA 2026 is '提出締切日 2026年5月6日（水）必着' -- and the numbered 規約 clauses that follow state the dates, eligibility, bands, categories and exchange but no submission span. All four of JARL's 2026 deadlines happen to fall exactly ten days after their contest ends, which is suggestive and is not a rule JARL wrote. The same reasoning already keeps a deadline off JARL's All Asian records.",
      "exchange": "RST, the prefecture or region number for where you are operating, and one letter for power -- H above 100 W, M to 100 W, L to 10 W (20 W on 50 MHz), P at 5 W or less. Tokyo at 10 watts on phone sends 5910L.",
      "country": "JP",
      "rules_url_archived": "",
      "rules_url_checked": "2026-08-19",
      "can_enter": false,
      "eligibility_scope": "entity_list",
      "eligibility_reason": "Entry limited to JA. K stations may be worked but cannot submit an entry.",
      "works": "everyone",
      "practical": "",
      "log_due": null,
      "uid": "jarl-all-ja-20300427T1200@contestcal",
      "start_date": "2030-04-27",
      "mode_families": [
        "CW",
        "SSB",
        "FM"
      ],
      "band_families": [
        "160m",
        "80m",
        "40m",
        "20m",
        "15m",
        "10m",
        "6m"
      ],
      "duration_bucket": "gte24"
    }
  ]
}