{"id":"timezone-converter","engine":"core","category":"date","name":"タイムゾーン変換","fields":[{"key":"instant","label":"時点（ISO 8601、時差を指定）","type":"text","default":"2026-11-11T12:00:00Z","required":true},{"key":"zones","label":"IANA タイムゾーン","type":"textarea","default":"UTC\nAsia/Shanghai\nAsia/Tokyo\nEurope/London\nAmerica/New_York","required":true}],"sample":{"instant":"2026-11-11T12:00:00Z","zones":"UTC\nAsia/Shanghai\nAsia/Tokyo\nEurope/London\nAmerica/New_York"}}