{"id":10258,"date":"2026-04-11T03:58:04","date_gmt":"2026-04-10T18:58:04","guid":{"rendered":"https:\/\/randyapps.com\/?post_type=blog&p=10258"},"modified":"2026-04-11T03:58:04","modified_gmt":"2026-04-10T18:58:04","slug":"10258","status":"publish","type":"blog","link":"https:\/\/randyapps.com\/ja\/blog\/10258","title":{"rendered":"\u3010JavaScript\u3011\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u8a08\u7b97 #2\uff1a\u30b5\u30de\u30fc\u30bf\u30a4\u30e0\u5883\u754c\u3067\u306e\u8aa4\u5224\u5b9a\u3092\u691c\u8a3c\u3059\u308b"},"content":{"rendered":"

<\/p>\n

\u524d\u56de\u306e\u8a18\u4e8b\u3067\u306f\u3001JavaScript\u306e\u6a19\u6e96\u6a5f\u80fd\uff08Date<\/code> \u3068 Intl<\/code>\uff09\u3092\u4f7f\u3063\u3066UTC\u3092\u9006\u7b97\u3059\u308b\u969b\u3001\u5b9f\u884c\u74b0\u5883\u306e\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306b\u5f71\u97ff\u3055\u308c\u3066\u3057\u307e\u3046\u554f\u984c\u306b\u3064\u3044\u3066\u89e6\u308c\u307e\u3057\u305f\u3002<\/p>\n

\u4eca\u56de\u306f\u3001\u79c1\u304c\u691c\u8a3c\u306e\u969b\u306b\u76f4\u9762\u3057\u305f\u300c1\u6642\u9593\u305a\u308c\u3066\u3057\u307e\u3046\u4e0d\u5177\u5408\u300d\u306e\u5b9f\u4f8b\u3068\u3001\u6a19\u6e96\u6a5f\u80fd\u3060\u3051\u3067\u305d\u308c\u3092\u89e3\u6c7a\u3057\u3088\u3046\u3068\u8a66\u884c\u932f\u8aa4\u3057\u3001\u6700\u7d42\u7684\u306b\u300c\u6a19\u6e96\u6a5f\u80fd\u3067\u306e\u89e3\u6c7a\u3092\u7d20\u76f4\u306b\u8ae6\u3081\u305f\u7406\u7531\u300d\u3092\u5171\u6709\u3057\u307e\u3059\u3002<\/p>\n

\u4ee5\u4e0b\u3001\u65e5\u672c\u3067\u958b\u767a\u3057\u3066\u3044\u308b\u3068\u3044\u3046\u524d\u63d0\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u5b9f\u884c\u74b0\u5883\u306e\u6642\u5dee\u304c\u5f15\u304d\u8d77\u3053\u3059\u4e0d\u5177\u5408\u306e\u5177\u4f53\u4f8b<\/h2>\n

\u591a\u304f\u306e\u5834\u5408\u306f\u554f\u984c\u306a\u304f\u6b63\u5e38\u306a\u6642\u523b\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u304c\u3001\u30b5\u30de\u30fc\u30bf\u30a4\u30e0\u306e\u5207\u308a\u66ff\u3048\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u3068\u8fd1\u3044\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u554f\u984c\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n

\u554f\u984c\u306e\u6839\u672c\u7684\u306a\u539f\u56e0\u306f\u3001\u7b2c\uff11\u56de\u306e\u5192\u982d\u3067\u3082\u89e6\u308c\u305f\u3001\u6587\u5b57\u5217\u304b\u3089 new Date('\u6642\u523b')<\/code> \u3092\u751f\u6210\u3057\u305f\u969b\u3001\u30d6\u30e9\u30a6\u30b6\u304c\u305d\u308c\u3092\u300c\u5b9f\u884c\u74b0\u5883\uff08\u4eca\u3044\u308b\u5834\u6240\uff09\u306e\u6642\u523b\u300d\u3068\u3057\u3066\u89e3\u91c8\u3057\u3066\u3057\u307e\u3046\u3053\u3068\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u3053\u308c\u306b\u3088\u308a\u3001\u30bf\u30fc\u30b2\u30c3\u30c8\u90fd\u5e02\u306e\u30b5\u30de\u30fc\u30bf\u30a4\u30e0\u5207\u308a\u66ff\u3048\u6642\u523b\u3092\u610f\u56f3\u305b\u305a\u307e\u305f\u3044\u3067\u3057\u307e\u3063\u305f\u6642\u3001\u672c\u6765\u3068\u306f\u7570\u306a\u308b\u30aa\u30d5\u30bb\u30c3\u30c8\uff08\u6642\u5dee\uff09\u3092\u53d6\u5f97\u3057\u3066\u3057\u307e\u3046\u73fe\u8c61\u304c\u8d77\u304d\u307e\u3059\u3002\u4ee3\u8868\u7684\u306a2\u3064\u306e\u30b1\u30fc\u30b9\u3092\u3001\u5185\u90e8\u306e\u8a08\u7b97\u30d7\u30ed\u30bb\u30b9\u3068\u5171\u306b\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n

\u30b1\u30fc\u30b91\uff1a\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\uff08\u6642\u5dee\u304c\u5927\u304d\u3044\u5834\u5408\u306e\u5927\u5e45\u306a\u305a\u308c\uff09<\/h3>\n

\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\uff08America\/New_York\uff09\u306e2026\u5e74\u306e\u590f\u6642\u9593\u306f\u30013\u67088\u65e5\uff08\u65e5\uff09\u306e\u5348\u524d2:00<\/strong>\u306b\u59cb\u307e\u308a\u3001\u6642\u8a08\u306e\u91dd\u304c1\u6642\u9593\u9032\u3093\u3067\u5348\u524d3:00\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u3053\u3053\u3067\u306f\u3001\u590f\u6642\u9593\u958b\u59cb\u5f8c\u306e\u300c3\u67088\u65e5 \u5348\u524d5:00\u300d<\/strong>\u306e\u6642\u523b\u3092UTC\u306b\u9006\u7b97\u3057\u3066\u307f\u307e\u3059\u3002\u672c\u6765\u3067\u3042\u308c\u3070\u3001\u590f\u6642\u9593\u306e\u30aa\u30d5\u30bb\u30c3\u30c8\u300c-04:00\u300d\u304c\u53d6\u5f97\u3055\u308c\u308b\u3079\u304d\u3067\u3059\u3002<\/p>\n

\n \u3010\u4e0d\u5177\u5408\u304c\u767a\u751f\u3059\u308b\u30b3\u30fc\u30c9\uff08\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\u7de8\uff09\u3011<\/strong><\/p>\n
const targetTimeStr = '2026-03-08T05:00:00'; \/\/ \u53d6\u5f97\u3057\u305f\u3044\u73fe\u5730\u6642\u523b\uff08\u590f\u6642\u9593\uff09\r\nconst targetTimeZone = 'America\/New_York';\r\n\r\nconst tempDate = new Date(targetTimeStr); \/\/ \u65e5\u672c\u306e\u30d6\u30e9\u30a6\u30b6\u3067\u89e3\u91c8\r\nconst formatter = new Intl.DateTimeFormat('en-US', { timeZone: targetTimeZone, timeZoneName: 'longOffset' });\r\nconst offsetString = formatter.formatToParts(tempDate).find(p => p.type === 'timeZoneName').value.replace('GMT', ''); \r\nconst finalUtcDate = new Date(`${targetTimeStr}${offsetString}`);\r\n\r\nconsole.log('\u53d6\u5f97\u3055\u308c\u305f\u30aa\u30d5\u30bb\u30c3\u30c8:', offsetString); \r\n\/\/ \u671f\u5f85\u5024: -04:00\uff08\u590f\u6642\u9593\uff09 \u2192 \u5b9f\u969b\u306e\u7d50\u679c: -05:00\uff08\u51ac\u6642\u9593\uff09\r\n\r\n\/\/ --- \u691c\u8a3c\uff08\u7b54\u3048\u5408\u308f\u305b\uff09 ---\r\n\/\/ \u6c42\u3081\u305fUTC\u304c\u6b63\u3057\u3044\u304b\u3001\u3082\u3046\u4e00\u5ea6\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\u6642\u9593\u306b\u623b\u3057\u3066\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3059\r\nconsole.log('\u73fe\u5730\u6642\u9593\u306b\u623b\u3057\u3066\u8868\u793a:', finalUtcDate.toLocaleString('ja-JP', { timeZone: targetTimeZone }));\r\n\/\/ \u671f\u5f85\u5024: 5:00:00\uff08\u6b63\u3057\u304f\u9006\u7b97\u3067\u304d\u3066\u3044\u308c\u3070\u3001\u5143\u306e\u6642\u523b\u306b\u623b\u308b\u306f\u305a\uff09\r\n\/\/ \u5b9f\u969b\u306e\u7d50\u679c: 6:00:00\uff081\u6642\u9593\u30ba\u30ec\u3066\u3057\u307e\u3063\u305f\uff01\uff09\r\n<\/code><\/pre>\n<\/div>\n
\u30b3\u30fc\u30c9\u306e\u5185\u90e8\u3067\u8d77\u304d\u3066\u3044\u308b\u3053\u3068\uff08\u5168\u624b\u9806\u306e\u89e3\u8aac\uff09<\/h4>\n
\u300c5:00\u300d\u3068\u6307\u5b9a\u3057\u305f\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u753b\u9762\u306b\u306f\u300c6:00\u300d\u3068\u8868\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u88cf\u5074\u3067\u30d6\u30e9\u30a6\u30b6\u304c\u884c\u3063\u3066\u3044\u308b\u8a08\u7b97\u30921\u30b9\u30c6\u30c3\u30d7\u305a\u3064\u8ffd\u3063\u3066\u307f\u307e\u3059\u3002<\/p>\n
    \n
  1. \u65e5\u672c\u6642\u9593\u3068\u3057\u3066\u306e\u89e3\u91c8\u3068UTC\u3078\u306e\u5909\u63db<\/strong>
    \n        new Date('2026-03-08T05:00:00')<\/code> \u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u65e5\u672c\u306e\u30d6\u30e9\u30a6\u30b6\u306f\u3053\u308c\u3092\u300c\u65e5\u672c\u6642\u9593\uff08UTC+9\uff09\u306e3\u67088\u65e5 \u671d5:00\u300d\u3068\u3057\u3066\u51e6\u7406\u3057\u307e\u3059\u3002
    \n        \u30d6\u30e9\u30a6\u30b6\u306f\u3053\u308c\u3092\u7d76\u5bfe\u7684\u306a\u57fa\u6e96\u3067\u3042\u308b\u4e16\u754c\u6a19\u6e96\u6642\uff08UTC\uff09\u306b\u5909\u63db\u3059\u308b\u305f\u3081\u30019\u6642\u9593\u3092\u5f15\u304d\u7b97\u3057\u307e\u3059\u3002
    \n        3\u67088\u65e5 05:00 \uff0d 9\u6642\u9593 \uff1d \u300c3\u67087\u65e5 20:00 (UTC)\u300d<\/code>
    \n        \u3053\u306e\u300c\u524d\u65e5\u306e\u591c8\u6642\u300d\u3068\u3044\u3046\u65e5\u6642\u304c\u3001UTC\u3068\u3057\u3066\u5185\u90e8\u7684\u306b\u4fdd\u6301\u3055\u308c\u307e\u3059\u3002<\/li>\n
  2. \u30cb\u30e5\u30fc\u30e8\u30fc\u30af\u6642\u9593\u3067\u306e\u518d\u8a08\u7b97\u3068\u30aa\u30d5\u30bb\u30c3\u30c8\u53d6\u5f97<\/strong>
    \n        \u6b21\u306b Intl<\/code> \u306f\u3001\u4fdd\u6301\u3057\u3066\u3044\u308b\u300cUTC 3\u67087\u65e5 20:00\u300d\u304c\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\u3067\u306f\u4f55\u6642\u306b\u306a\u308b\u304b\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002
    \n        3\u67087\u65e5\u306e\u6642\u70b9\u3067\u306f\u3001\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\u306f\u307e\u3060\u590f\u6642\u9593\u304c\u59cb\u307e\u3063\u3066\u3044\u306a\u3044\u305f\u3081\u3001\u51ac\u6642\u9593\uff08UTC-5\uff09\u3067\u3059\u3002
    \n        20:00 (UTC) \uff0d 5\u6642\u9593 \uff1d \u300c3\u67087\u65e5 15:00\u300d<\/code>
    \n        \u672c\u6765\u8abf\u3079\u305f\u304b\u3063\u305f\u306e\u306f3\u67088\u65e5\u306e\u671d5\u6642\u306a\u306e\u306b\u3001\u65e5\u672c\u3068\u306e\u5927\u304d\u306a\u6642\u5dee\u306e\u305b\u3044\u3067\u3001formatter.formatToParts(tempDate)<\/code> \u3092\u5b9f\u884c\u3057\u3066\u30aa\u30d5\u30bb\u30c3\u30c8\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306e\u5224\u5b9a\u7528\u306e\u65e5\u6642\u304c\u300c\u524d\u65e5\u306e\u5348\u5f8c3\u6642\u300d<\/strong>\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u7d50\u679c\u3068\u3057\u3066\u3001\u30d6\u30e9\u30a6\u30b6\u306f\u307e\u3060\u51ac\u6642\u9593\u3067\u3042\u308b\u3068\u5224\u65ad\u3057\u3001\u8aa4\u3063\u305f\u30aa\u30d5\u30bb\u30c3\u30c8\u300c-05:00\u300d<\/strong>\u3092\u53d6\u5f97\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/li>\n
  3. \u8aa4\u3063\u305f\u5024\u3067\u306eUTC\u9006\u7b97<\/strong>
    \n        \u672c\u6765\u306f\u590f\u6642\u9593\u306e\u300c-04:00\u300d\u3092\u7d50\u5408\u3059\u3079\u304d\u3068\u3053\u308d\u3092\u3001\u53d6\u5f97\u3057\u3066\u3057\u307e\u3063\u305f\u300c-05:00\u300d\u3092\u6587\u5b57\u5217\u306b\u7d50\u5408\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002
    \n        new Date('2026-03-08T05:00:00-05:00')<\/code><\/li>\n
  4. \u78ba\u8a8d<\/strong>
    \n        \u78ba\u8a8d\u306e\u305f\u3081\u306b\u3053\u306eUTC\u304b\u3089\u518d\u3073\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\u6642\u9593\u3068\u3057\u3066\u753b\u9762\u306b\u8868\u793a\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002
    \n        \u3059\u308b\u3068\u3001\u7d50\u679c\u3068\u3057\u3066\u300c6:00\u300d\u3068\u3044\u30461\u6642\u9593\u305a\u308c\u305f\u6642\u523b\u304c\u51fa\u529b\u3055\u308c\u307e\u3057\u305f\u3002
    \n        \u3053\u308c\u306f\u3064\u307e\u308a\u3001\u6c42\u3081\u305fUTC\u304c\u6b63\u3057\u304f\u306a\u3044\u3068\u3044\u3046\u4e8b\u3092\u610f\u5473\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ol>\n
    \u30b1\u30fc\u30b92\uff1a\u30a2\u30c7\u30ec\u30fc\u30c9\uff08\u6642\u5dee\u304c\u308f\u305a\u304b30\u5206\u306e\u5834\u5408\u3067\u3082\u8d77\u3053\u308b\u4e0d\u5177\u5408\uff09<\/h3>\n
    \u6642\u5dee\u304c\u5927\u304d\u3044\u304b\u3089\u305a\u308c\u308b\u306e\u3060\u3068\u601d\u3046\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u65e5\u672c\u3068\u308f\u305a\u304b\u300c30\u5206\uff08UTC+9:30\uff09\u300d\u3057\u304b\u6642\u5dee\u304c\u306a\u3044\u30aa\u30fc\u30b9\u30c8\u30e9\u30ea\u30a2\u306e\u30a2\u30c7\u30ec\u30fc\u30c9\uff08Australia\/Adelaide\uff09<\/strong>\u3067\u3082\u3001\u4e0d\u5177\u5408\u304c\u8d77\u3053\u308a\u307e\u3059\u30022026\u5e74\u306e\u590f\u6642\u9593\u306f\u300110\u67084\u65e5\uff08\u65e5\uff09\u306e\u5348\u524d2:00<\/strong>\u306b\u958b\u59cb\u3055\u308c\u307e\u3059\u3002<\/p>\n
    \u4eca\u5ea6\u306f\u5207\u308a\u66ff\u3048\u76f4\u524d\u306e\u300c10\u67084\u65e5 \u5348\u524d1:30\u300d<\/strong>\u3092\u9006\u7b97\u3057\u3066\u307f\u307e\u3059\u3002\u672c\u6765\u306f\u590f\u6642\u9593\u524d\u306e\u300c+09:30\u300d\u304c\u53d6\u5f97\u3055\u308c\u308b\u3079\u304d\u3067\u3059\u3002<\/p>\n
    \n    \u3010\u4e0d\u5177\u5408\u304c\u767a\u751f\u3059\u308b\u30b3\u30fc\u30c9\uff08\u30a2\u30c7\u30ec\u30fc\u30c9\u7de8\uff09\u3011<\/strong><\/p>\n
    const targetTimeStr = '2026-10-04T01:30:00'; \/\/ \u53d6\u5f97\u3057\u305f\u3044\u73fe\u5730\u6642\u523b\uff08\u590f\u6642\u9593\u524d\uff09\r\nconst targetTimeZone = 'Australia\/Adelaide';\r\n\r\nconst tempDate = new Date(targetTimeStr); \r\nconst formatter = new Intl.DateTimeFormat('en-US', { timeZone: targetTimeZone, timeZoneName: 'longOffset' });\r\nconst offsetString = formatter.formatToParts(tempDate).find(p => p.type === 'timeZoneName').value.replace('GMT', ''); \r\nconst finalUtcDate = new Date(`${targetTimeStr}${offsetString}`);\r\n\r\nconsole.log('\u53d6\u5f97\u3055\u308c\u305f\u30aa\u30d5\u30bb\u30c3\u30c8:', offsetString); \r\n\/\/ \u671f\u5f85\u5024: +09:30\uff08\u590f\u6642\u9593\u524d\uff09 \u2192 \u5b9f\u969b\u306e\u7d50\u679c: +10:30\uff08\u590f\u6642\u9593\uff09\r\n\r\n\/\/ --- \u691c\u8a3c\uff08\u7b54\u3048\u5408\u308f\u305b\uff09 ---\r\nconsole.log('\u73fe\u5730\u6642\u9593\u306b\u623b\u3057\u3066\u8868\u793a:', finalUtcDate.toLocaleString('ja-JP', { timeZone: targetTimeZone }));\r\n\/\/ \u671f\u5f85\u5024: 1:30:00 \u2192 \u5b9f\u969b\u306e\u7d50\u679c: 0:30:00\r\n<\/code><\/pre>\n<\/div>\n
    \u30b3\u30fc\u30c9\u306e\u5185\u90e8\u3067\u8d77\u304d\u3066\u3044\u308b\u3053\u3068\uff08\u5168\u624b\u9806\u306e\u89e3\u8aac\uff09<\/h4>\n
    \u4eca\u5ea6\u306f\u300c1:30\u300d\u304c\u300c0:30\u300d\u3078\u30681\u6642\u9593\u623b\u3063\u3066\u3057\u307e\u3044\u307e\u3057\u305f\u3002\u6642\u5dee\u304c\u305f\u3063\u305f30\u5206\u3057\u304b\u306a\u3044\u306e\u306b\u306a\u305c\u305a\u308c\u308b\u306e\u304b\u3001\u8a08\u7b97\u3092\u8ffd\u3063\u3066\u307f\u307e\u3059\u3002<\/p>\n
      \n
    1. \u65e5\u672c\u6642\u9593\u3068\u3057\u3066\u306e\u89e3\u91c8\u3068UTC\u3078\u306e\u5909\u63db<\/strong>
      \n        new Date('2026-10-04T01:30:00')<\/code> \u306f\u3001\u300c\u65e5\u672c\u6642\u9593\uff08UTC+9\uff09\u306e10\u67084\u65e5 1:30\u300d\u3068\u3057\u3066\u51e6\u7406\u3055\u308c\u307e\u3059\u3002
      \n        \u3053\u306e\u30b3\u30fc\u30c9\u3092\u65e5\u672c\u3067\u52d5\u304b\u3057\u305f\u5834\u5408\u3001UTC\u306b\u5909\u63db\u3059\u308b\u305f\u3081\u306b9\u6642\u9593\u304c\u5f15\u304b\u308c\u307e\u3059\u3002
      \n        10\u67084\u65e5 01:30 \uff0d 9\u6642\u9593 \uff1d \u300c10\u67083\u65e5 16:30 (UTC)\u300d<\/code>
      \n        \u3053\u308c\u304c\u5185\u90e8\u3067\u4fdd\u6301\u3055\u308c\u308bUTC\u306e\u65e5\u6642\u3067\u3059\u3002<\/li>\n
    2. \u30a2\u30c7\u30ec\u30fc\u30c9\u6642\u9593\u3067\u306e\u518d\u8a08\u7b97\u3068\u30aa\u30d5\u30bb\u30c3\u30c8\u53d6\u5f97<\/strong>
      \n        Intl<\/code> \u304c\u3001\u300cUTC 10\u67083\u65e5 16:30\u300d\u3092\u30a2\u30c7\u30ec\u30fc\u30c9\u6642\u9593\uff08UTC+9:30\uff09\u306b\u76f4\u3057\u3066\u5224\u5b9a\u3092\u884c\u3044\u307e\u3059\u3002
      \n        16:30 (UTC) \uff0b 9\u6642\u959330\u5206 \uff1d \u300c10\u67084\u65e5 02:00\u4e01\u5ea6\u300d<\/code>
      \n        \u3069\u3046\u3067\u3057\u3087\u3046\u304b\u3002\u65e5\u672c\u3068\u306f\u308f\u305a\u304b30\u5206\u306e\u6642\u5dee\u3057\u304b\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u30aa\u30d5\u30bb\u30c3\u30c8\u3092\u5224\u5b9a\u3059\u308b\u30bf\u30a4\u30df\u30f3\u30b0\u304c\u3001\u590f\u6642\u9593\u304c\u958b\u59cb\u3055\u308c\u308b\u300c\u5348\u524d2:00\u4e01\u5ea6\u300d\u306b\u30d4\u30c3\u30bf\u30ea\u91cd\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3057\u305f\u3002<\/strong>
      \n        \u7d50\u679c\u3068\u3057\u3066\u3001\u30d6\u30e9\u30a6\u30b6\u306f\u300c\u3059\u3067\u306b\u590f\u6642\u9593\u3067\u3042\u308b\u300d\u3068\u8aa4\u3063\u3066\u5224\u5b9a\u3057\u3001\u590f\u6642\u9593\u7528\u306e\u300c+10:30\u300d<\/strong>\u3092\u30aa\u30d5\u30bb\u30c3\u30c8\u3068\u3057\u3066\u8fd4\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/li>\n
    3. \u8aa4\u3063\u305f\u5024\u3067\u306eUTC\u9006\u7b97\u3068\u6642\u523b\u306e\u305a\u308c<\/strong>
      \n        \u672c\u6765\u306f\u590f\u6642\u9593\u524d\u306e\u300c+09:30\u300d\u3092\u7d50\u5408\u3059\u3079\u304d\u3068\u3053\u308d\u3092\u3001\u53d6\u5f97\u3057\u3066\u3057\u307e\u3063\u305f\u300c+10:30\u300d\u3092\u7d50\u5408\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002
      \n        new Date('2026-10-04T01:30:00+10:30')<\/code>
      \n        1\u6642\u9593\u5206\u4f59\u8a08\u306b\u9032\u3093\u3060\u30aa\u30d5\u30bb\u30c3\u30c8\u3092\u4f7f\u3063\u3066UTC\u3092\u9006\u7b97\u3057\u305f\u7d50\u679c\u3001\u691c\u8a3c\u306e\u305f\u3081\u306b\u73fe\u5730\u6642\u9593\u3078\u623b\u3057\u305f\u6700\u7d42\u7684\u306a\u6642\u523b\u304c1\u6642\u9593\u5dfb\u304d\u623b\u3063\u305f\u300c0:30\u300d\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u306e\u3067\u3059\u3002<\/li>\n<\/ol>\n
      \u65e5\u672c\u3067\u306e\u958b\u767a\u4e2d\u306b\u898b\u3064\u3051\u305f\u300c\u4e00\u898b\u826f\u3055\u305d\u3046\u306a\u300d\u56de\u907f\u7b56<\/h2>\n
      \u3053\u308c\u3089\u306e\u554f\u984c\u3092\u56de\u907f\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u300c\u30aa\u30d5\u30bb\u30c3\u30c8\u3092\u53d6\u5f97\u3059\u308b\u6642\u523b\u300d\u304c\u3001\u73fe\u5730\u306e\u30b5\u30de\u30fc\u30bf\u30a4\u30e0\u5207\u308a\u66ff\u3048\u6642\u9593\uff08\u6df1\u591c0\u6642\u301c3\u6642\u9803\uff09\u3092\u7d76\u5bfe\u306b\u307e\u305f\u304c\u306a\u3044\u3088\u3046\u306b\u5de5\u592b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
      \u305d\u3053\u3067\u79c1\u306f\u3001\u5224\u5b9a\u7528\u306e\u6642\u523b\u3092\u4e00\u6642\u7684\u306b\u5b89\u5168\u306a\u6642\u9593\u5e2f\u306b\u7f6e\u304d\u63db\u3048\u3066\u305d\u306e\u65e5\u306e\u300c\u66ab\u5b9a\u30aa\u30d5\u30bb\u30c3\u30c8\u300d\u3092\u53d6\u5f97\u3057\u3001\u305d\u308c\u3092\u4f7f\u3063\u3066\u304b\u3089\u672c\u6765\u306e\u6642\u523b\u306e\u6b63\u78ba\u306a\u30aa\u30d5\u30bb\u30c3\u30c8\u3092\u518d\u53d6\u5f97\u3059\u308b\u3068\u3044\u3046\u300c\u4e8c\u6bb5\u968e\u691c\u8a3c\u300d\u306e\u30ed\u30b8\u30c3\u30af\u3092\u8003\u6848\u3057\u307e\u3057\u305f\u3002<\/p>\n
      \u3067\u306f\u3001\u4e00\u6642\u7684\u306b\u7f6e\u304d\u63db\u3048\u308b\u300c\u5b89\u5168\u306a\u6642\u9593\u300d\u3092\u4f55\u6642\u306b\u3059\u3079\u304d\u304b\u3002\u79c1\u306f\u691c\u8a3c\u306e\u672b\u306b\u300c22\u6642\u300d<\/strong>\u3092\u9078\u629e\u3057\u307e\u3057\u305f\u3002\u306a\u305c\u672c\u6765\u306e\u6642\u523b\u3067\u306f\u306a\u304f\u300122\u6642\u3068\u3044\u3046\u7279\u5b9a\u306e\u6642\u9593\u3092\u8d77\u70b9\u306b\u3057\u305f\u306e\u304b\u3002\u305d\u308c\u306f\u3001\u65e5\u672c\u3067\u958b\u767a\u3057\u3066\u3044\u308b\u74b0\u5883\uff08JST\uff09\u306b\u304a\u3044\u3066\u3001\u3053\u308c\u304c\u5b8c\u74a7\u306a\u30de\u30b8\u30c3\u30af\u30ca\u30f3\u30d0\u30fc\u306b\u898b\u3048\u305f\u304b\u3089\u3067\u3059\u3002<\/p>\n
      \u65e5\u672c\u57fa\u6e96\u3067\u8003\u3048\u305f\u6642\u306e\u300c22\u6642\u306e\u9b54\u6cd5\u300d\u2026\u2026\u3068\u305d\u306e\u9650\u754c<\/h4>\n
      \u65e5\u672c\u306e\u30d6\u30e9\u30a6\u30b6\u3067 new Date('...T22:00:00')<\/code> \u3068\u6307\u5b9a\u3059\u308b\u3068\u3001\u4e16\u754c\u6a19\u6e96\u6642\uff08UTC\uff09\u3067\u306f9\u6642\u9593\u5f15\u304b\u308c\u3066\u300c13:00 (UTC)\u300d<\/strong>\u3068\u3057\u3066\u4fdd\u6301\u3055\u308c\u307e\u3059\u3002
      \n\u3053\u306e\u300cUTC 13:00\u300d\u3092\u57fa\u6e96\u306b\u3057\u3066\u3001\u4e16\u754c\u4e2d\u306e\u90fd\u5e02\u306e\u73fe\u5730\u6642\u9593\u3092\u8a08\u7b97\u3057\u3066\u307f\u308b\u3068\u3069\u3046\u306a\u308b\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n
        \n
      • \u30cb\u30e5\u30fc\u30e8\u30fc\u30af\uff08UTC-5\uff09\u306e\u5834\u5408\uff1a<\/strong> 13:00 \uff0d 5\u6642\u9593 \uff1d \u671d\u306e8:00<\/strong><\/li>\n
      • \u30ed\u30f3\u30c9\u30f3\uff08UTC+0\uff09\u306e\u5834\u5408\uff1a<\/strong> 13:00 \uff0b 0\u6642\u9593 \uff1d \u663c\u306e13:00<\/strong><\/li>\n
      • \u30a2\u30c7\u30ec\u30fc\u30c9\uff08UTC+9:30\uff09\u306e\u5834\u5408\uff1a<\/strong> 13:00 \uff0b 9\u6642\u959330\u5206 \uff1d \u591c\u306e22:30<\/strong><\/li>\n<\/ul>\n
        \u300c\u65e5\u672c\u3067\u306e22\u6642\u300d\u3092\u8d77\u70b9\u306b\u3057\u3066\u4e16\u754c\u6a19\u6e96\u6642\uff08UTC 13:00\uff09\u3092\u4f5c\u308a\u51fa\u3059\u3068\u3001\u591a\u304f\u306e\u4e3b\u8981\u90fd\u5e02\u306b\u304a\u3044\u3066\u30b5\u30de\u30fc\u30bf\u30a4\u30e0\u304c\u5207\u308a\u66ff\u308f\u308b\u300c\u6df1\u591c0\u6642\u301c3\u6642\u306e\u5371\u967a\u5730\u5e2f\u300d\u3092\u898b\u4e8b\u306b\u907f\u3051\u3066\u3001\u5b89\u5168\u306a\u65e5\u4e2d\u3084\u591c\u306e\u6642\u9593\u5e2f\u306b\u306a\u308b\u306e\u3067\u3059\u3002<\/p>\n
        \n    \u3010\u65e5\u672c\u56fd\u5185\u3067\u3042\u308c\u3070\u300c\u307b\u307c\u300d\u6210\u529f\u3059\u308b\u30b3\u30fc\u30c9\u3011<\/strong><\/p>\n
        const targetTimeStr = '2026-10-04T01:30:00';\r\nconst targetTimeZone = 'Australia\/Adelaide';\r\n\r\nfunction getOffsetAt(dateObj) {\r\n  const formatter = new Intl.DateTimeFormat('en-US', { timeZone: targetTimeZone, timeZoneName: 'longOffset' });\r\n  return formatter.formatToParts(dateObj).find(p => p.type === 'timeZoneName').value.replace('GMT', '') || 'Z';\r\n}\r\n\r\n\/\/ 1. \u6642\u9593\u3092\u300c22:00\u300d\u306b\u5f37\u5236\u5909\u66f4\u3057\u3001\u305d\u306e\u65e5\u306e\u66ab\u5b9a\u30aa\u30d5\u30bb\u30c3\u30c8\u3092\u5b89\u5168\u5730\u5e2f\u3067\u53d6\u5f97\r\nconst safeTimeStr = targetTimeStr.replace(\/T\\d{2}:\\d{2}:\\d{2}\/, 'T22:00:00');\r\nconst provisionalOffset = getOffsetAt(new Date(safeTimeStr)); \r\n\r\n\/\/ 2. \u66ab\u5b9a\u30aa\u30d5\u30bb\u30c3\u30c8\u3067UTC\u3092\u4eee\u4f5c\u6210\u3057\u3001\u672c\u6765\u306e\u6642\u523b\u306e\u771f\u306e\u30aa\u30d5\u30bb\u30c3\u30c8\u3092\u518d\u53d6\u5f97\r\nconst provisionalUtc = new Date(`${targetTimeStr}${provisionalOffset}`);\r\nconst finalOffset = getOffsetAt(provisionalUtc);\r\n\r\nconst finalUtcDate = new Date(`${targetTimeStr}${finalOffset}`);\r\n\/\/ \u65e5\u672c\u56fd\u5185\u3067\u306e\u591a\u304f\u306e\u90fd\u5e02\u306e\u5224\u5b9a\u306b\u306f\u6709\u52b9\u3067\u3057\u305f\u304c\u3001\u5730\u7403\u898f\u6a21\u3067\u306f\u9650\u754c\u304c\u3042\u308a\u307e\u3057\u305f\u3002\r\n<\/code><\/pre>\n<\/div>\n
        \u3057\u304b\u3057\u3001\u3055\u3089\u306b\u691c\u8a3c\u3092\u91cd\u306d\u308b\u3046\u3061\u306b\u3001\u3053\u306e\u300c\u9b54\u6cd5\u300d\u304c\u901a\u7528\u3057\u306a\u3044\u6975\u7aef\u306a\u5730\u57df\u304c\u3042\u308b\u3053\u3068\u306b\u6c17\u3065\u304d\u307e\u3057\u305f\u3002\u5730\u7403\u306e\u6642\u5dee\u306e\u5e45\u306f\u601d\u3063\u3066\u3044\u308b\u4ee5\u4e0a\u306b\u5e83\u304b\u3063\u305f\u306e\u3067\u3059\u3002<\/p>\n
          \n
        • \u30ad\u30ea\u30d0\u30b9\uff08UTC+14\uff09\u306e\u5834\u5408\uff1a<\/strong>
          \n    \u4e16\u754c\u3067\u6700\u3082\u65e9\u304f\u65e5\u4ed8\u304c\u5909\u308f\u308b\u30ad\u30ea\u30d0\u30b9\u3067\u306f\u3001\u6642\u5dee\u304c UTC+14<\/strong> \u306b\u3082\u306a\u308a\u307e\u3059\u3002
          \n    13:00 (UTC) \uff0b 14\u6642\u9593 \uff1d 27:00\uff08\u7fcc\u65e5\u306e\u5348\u524d3:00\uff09<\/code>
          \n    \u3053\u308c\u3067\u306f\u5224\u5b9a\u30bf\u30a4\u30df\u30f3\u30b0\u304c\u7fcc\u65e5\u306e\u65e5\u4ed8\u306b\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3057\u3001\u3055\u3089\u306b\u5348\u524d3\u6642\u3068\u3044\u3046\u3001\u307e\u3055\u306b\u590f\u6642\u9593\u3078\u306e\u5207\u308a\u66ff\u308f\u308a\u304c\u3042\u308a\u305d\u3046\u306a\u300c\u6df1\u591c\u306e\u6642\u9593\u5e2f\u300d\u3068\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/li>\n
        • \u30d9\u30fc\u30ab\u30fc\u5cf6\uff08UTC-12\uff09\u306a\u3069\u306e\u5834\u5408\uff1a<\/strong>
          \n    \u4e16\u754c\u3067\u6700\u3082\u6642\u5dee\u304c\u9045\u3044 UTC-12<\/strong> \u306e\u5730\u57df\u3067\u306f\u3069\u3046\u3067\u3057\u3087\u3046\u304b\u3002
          \n    13:00 (UTC) \uff0d 12\u6642\u9593 \uff1d \u6df1\u591c 01:00<\/code>
          \n    \u3053\u306e\u69d8\u306b\u30b5\u30de\u30fc\u30bf\u30a4\u30e0\u5207\u308a\u66ff\u3048\u304c\u3042\u308a\u305d\u3046\u306a\u300c\u5348\u524d1\u6642\u300d\u3068\u3044\u3046\u6642\u9593\u306b\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/li>\n<\/ul>\n
          \u304b\u306a\u308a\u591a\u304f\u306e\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u3067\u6b63\u5e38\u306b\u52d5\u304f\u69d8\u306b\u306f\u306a\u3063\u305f\u306e\u3067\u3059\u304c\u3001\u3084\u306f\u308a100%\u30ab\u30d0\u30fc\u3059\u308b\u306e\u306f\u7121\u7406\u305d\u3046\u3060\u3068\u3044\u3046\u7d50\u8ad6\u306b\u8fbf\u308a\u7740\u304d\u307e\u3057\u305f\u3002<\/p>\n
          \u3053\u306e\u6975\u7aef\u306a\u6642\u5dee\u3092\u6301\u3064\u90fd\u5e02\u306b\u6c17\u3065\u304f\u524d\u306f\u3001\u300c\u3053\u308c\u306a\u3089\u3001\u3069\u3093\u306a\u90fd\u5e02\u3092\u6307\u5b9a\u3055\u308c\u3066\u3082\u7d76\u5bfe\u306b\u5883\u754c\u7dda\u3092\u8e0f\u307e\u305a\u306b\u5b89\u5168\u306a\u30aa\u30d5\u30bb\u30c3\u30c8\u304c\u53d6\u5f97\u3067\u304d\u308b\uff01\u300d\u3068\u601d\u3063\u3066\u3044\u305f\u306e\u3067\u3059\u304c\u3001\u305d\u3082\u305d\u3082\u300c22\u6642\u306b\u5909\u66f4\u3059\u308b\u300d\u3084\u3001\u300c\u30ad\u30ea\u30d0\u30b9\u306a\u3069\u306e\u6975\u7aef\u306a\u6642\u5dee\u3060\u3068\u99c4\u76ee\u300d\u306a\u3069\u306e\u8a71\u4ee5\u524d\u306b\u3001\u3053\u306e\u65b9\u6cd5\u306f\u300c\u6700\u521d\u304b\u3089\u5b8c\u74a7\u306b\u99c4\u76ee\u306a\u89e3\u6c7a\u7b56\u300d\u3060\u3063\u305f\u4e8b\u306b\u5f8c\u304b\u3089\u6c17\u3065\u304d\u307e\u3059\u3002<\/p>\n
          \u6700\u592726\u6642\u9593\u306e\u58c1<\/h2>\n
          \u6700\u521d\u306b\u66f8\u3044\u305f\u5f53\u521d\u306f\u5b8c\u74a7\u3060\u3068\u601d\u3063\u3066\u3044\u305f\u300c22\u6642\u306e\u4e8c\u6bb5\u968e\u691c\u8a3c\u300d\u3067\u3059\u304c\u3001\u5f8c\u304b\u3089\u5b8c\u5168\u3067\u306f\u7121\u3044\u4e8b\u3082\u308f\u304b\u308a\u307e\u3057\u305f\u3057\u3001\u3053\u306e\u30b3\u30fc\u30c9\u3092\u30b0\u30ed\u30fc\u30d0\u30eb\u306b\u516c\u958b\u3059\u308b\u3053\u3068\u3092\u60f3\u5b9a\u3057\u3001\u300c\u3082\u3057\u5225\u306e\u56fd\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u5b9f\u884c\u3057\u305f\u3089\u2026\u2026\u300d\u3068\u8003\u3048\u305f\u6642\u3001\u3053\u306e\u30ed\u30b8\u30c3\u30af\u306f\u5b8c\u5168\u306b\u7834\u7dbb\u3059\u308b\u3053\u3068\u306b\u6c17\u3065\u304d\u307e\u3057\u305f\u3002<\/p>\n
          \u5f53\u305f\u308a\u524d\u3067\u3059\u304c\u3001\u5148\u306e\u56de\u907f\u30b3\u30fc\u30c9\u306e\u4e2d\u3067\u3001\u5168\u3066\u306e\u56fd\u306e\u4eba\u306e\u30d6\u30e9\u30a6\u30b6\u3067\u57fa\u6e96\u3068\u306a\u308bUTC\u304c 13:00 \u306b\u306a\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u5f53\u6642\u306e\u79c1\u306f\u305d\u3093\u306a\u4e8b\u306f\u3059\u3063\u304b\u308a\u5fd8\u308c\u3066\u300c\u306a\u3093\u3068\u304b\u6b63\u3057\u3044\u6642\u523b\u3092\u6a19\u6e96\u6a5f\u80fd\u3060\u3051\u3067\u53d6\u5f97\u3057\u3066\u3084\u308b\u305e\u300d\u3068\u3001\u610f\u5730\u306b\u306a\u3063\u3066\u3044\u305f\u69d8\u306b\u601d\u3044\u307e\u3059\u3002<\/p>\n
          \u30d6\u30e9\u30a6\u30b6\u3067\u6642\u9593\u3092\u56fa\u5b9a\u3057\u3066\u5224\u5b9a\u3059\u308b\u5834\u5408\u3001\u30bf\u30fc\u30b2\u30c3\u30c8\u90fd\u5e02\u3067\u306e\u5224\u5b9a\u6642\u523b\u306f\u4ee5\u4e0b\u306e\u5f0f\u3067\u6c7a\u307e\u308a\u307e\u3059\u3002<\/p>\n
          \u5224\u5b9a\u6642\u523b \uff1d \u56fa\u5b9a\u3057\u305f\u6642\u9593 \uff0b (\u30bf\u30fc\u30b2\u30c3\u30c8\u306e\u6642\u5dee \uff0d \u5b9f\u884c\u74b0\u5883\u306e\u6642\u5dee)<\/code><\/p>\n
          \u5730\u7403\u4e0a\u306e\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306f\u3001\u6700\u3082\u9045\u3044\u5730\u57df\uff08UTC-12\uff09\u304b\u3089\u6700\u3082\u65e9\u3044\u5730\u57df\uff08UTC+14\uff09\u307e\u3067\u3001\u6700\u5927\u306726\u6642\u9593<\/strong>\u3082\u306e\u958b\u304d\u304c\u3042\u308a\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u4e0a\u8a18\u306e\u5f0f\u306b\u304a\u3051\u308b\u6642\u5dee\u306e\u5dee\u306f -26\u6642\u9593 \u304b\u3089 +26\u6642\u9593<\/code> \u307e\u3067\u306e\u3042\u3089\u3086\u308b\u5024\u306b\u306a\u308a\u5f97\u308b\u306e\u3067\u3059\u3002<\/p>\n
          \u5148\u7a0b\u306e\u30b3\u30fc\u30c9\u3092\u65e5\u672c\u4ee5\u5916\u3067\u52d5\u304b\u3057\u305f\u5834\u5408\u306e\u5177\u4f53\u7684\u306a\u4f8b\u3068\u8a08\u7b97\u5f0f\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
            \n
          • \u30ed\u30b5\u30f3\u30bc\u30eb\u30b9\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\u3092\u8abf\u3079\u305f\u5834\u5408\uff1a<\/strong>
            \n    \u5b9f\u884c\u74b0\u5883\u3067\u3042\u308b\u30ed\u30b5\u30f3\u30bc\u30eb\u30b9\uff08\u51ac\u6642\u9593\uff09\u306f UTC-8<\/strong> \u3067\u3059\u3002
            \n    \u30bf\u30fc\u30b2\u30c3\u30c8\u3067\u3042\u308b\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\uff08\u51ac\u6642\u9593\uff09\u306f UTC-5<\/strong> \u3067\u3059\u3002
            \n    \u6642\u5dee\u306e\u5dee\u5206\u306f -5 \uff0d (-8) \uff1d \uff0b3\u6642\u9593<\/code> \u3068\u306a\u308a\u307e\u3059\u3002
            \n    \u3053\u308c\u3092\u5148\u307b\u3069\u306e\u5f0f\u306b\u5f53\u3066\u306f\u3081\u308b\u3068\u300122:00 \uff0b 3\u6642\u9593 \uff1d 25:00\uff08\u7fcc\u65e5\u306e\u5348\u524d1:00\uff09<\/code> \u3068\u306a\u308a\u307e\u3059\u3002\u5b89\u5168\u306a\u306f\u305a\u306e22\u6642\u304c\u3001\u30b5\u30de\u30fc\u30bf\u30a4\u30e0\u306e\u5883\u754c\u7dda\u306b\u6975\u3081\u3066\u8fd1\u3044\u6df1\u591c1\u6642\u306b\u5909\u63db\u3055\u308c\u3066\u3057\u307e\u3044\u3001\u5224\u5b9a\u304c\u4e0d\u5b89\u5b9a\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n
          • \u65e5\u672c\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u30cb\u30e5\u30fc\u30b8\u30fc\u30e9\u30f3\u30c9\u3092\u8abf\u3079\u305f\u5834\u5408\uff1a<\/strong>
            \n    \u5b9f\u884c\u74b0\u5883\u3067\u3042\u308b\u65e5\u672c\u306f UTC+9<\/strong> \u3067\u3059\u3002
            \n    \u30bf\u30fc\u30b2\u30c3\u30c8\u3067\u3042\u308b\u30cb\u30e5\u30fc\u30b8\u30fc\u30e9\u30f3\u30c9\uff08\u590f\u6642\u9593\uff09\u306f UTC+13<\/strong> \u3067\u3059\u3002
            \n    \u6642\u5dee\u306e\u5dee\u5206\u306f +13 \uff0d (+9) \uff1d \uff0b4\u6642\u9593<\/code> \u3068\u306a\u308a\u307e\u3059\u3002
            \n    \u5f0f\u306b\u5f53\u3066\u306f\u3081\u308b\u3068\u300122:00 \uff0b 4\u6642\u9593 \uff1d 26:00\uff08\u7fcc\u65e5\u306e\u5348\u524d2:00\uff09<\/code> \u3068\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30cb\u30e5\u30fc\u30b8\u30fc\u30e9\u30f3\u30c9\u306e\u30b5\u30de\u30fc\u30bf\u30a4\u30e0\u5207\u308a\u66ff\u3048\u6642\u523b\u3067\u3042\u308b\u5348\u524d2\u6642\u306b\u5b8c\u5168\u4e00\u81f4<\/strong>\u3057\u3066\u304a\u308a\u3001\u8a08\u7b97\u304c\u305a\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/li>\n<\/ul>\n
            \u300c18\u6642\u308420\u6642\u306b\u305a\u3089\u305b\u3070\u3044\u3044\u306e\u3067\u306f\uff1f\u300d\u300cUTC\u3092\u57fa\u6e96\u306b\u3059\u308c\u3070\u2026\u2026\uff1f\u300d\u3068\u8272\u3005\u3068\u8a66\u884c\u932f\u8aa4\u306f\u3057\u3066\u307f\u305f\u306e\u3067\u3059\u304c\u3001\u7d50\u5c40\u306f\u540c\u3058\u3067\u3057\u305f\u3002\u6700\u592726\u6642\u9593\u3082\u306e\u6642\u5dee\u306e\u958b\u304d\u304c\u3042\u308b\u4ee5\u4e0a\u3001\u5730\u7403\u4e0a\u306e\u3059\u3079\u3066\u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u5883\u754c\u7dda\u3092\u4e00\u767a\u3067\u907f\u3051\u3089\u308c\u308b\u6642\u9593\u306f\u3001\u3069\u3053\u306b\u3082\u5b58\u5728\u3057\u306a\u3044\u304b\u3089\u3067\u3059\u3002<\/p>\n
            \u51b7\u9759\u306b\u8003\u3048\u308b\u3068\u3001\u3053\u306e\u300c\u3042\u3089\u304b\u3058\u3081\u6642\u9593\u3092\u305a\u3089\u3057\u3066\u5224\u5b9a\u3059\u308b\u300d\u3068\u3044\u3046\u4f5c\u6226\u306f\u3001\u6839\u672c\u7684\u306a\u77db\u76fe\u3092\u62b1\u3048\u3066\u3044\u307e\u3057\u305f\u3002\u300c\u4f55\u6642\u9593\u305a\u3089\u305b\u3070\u3044\u3044\u304b\u300d\u3092\u77e5\u308b\u305f\u3081\u306b\u5fc5\u8981\u306a\u300e\u30aa\u30d5\u30bb\u30c3\u30c8\u300f\u304c\u3001\u307e\u3055\u306b\u4eca\u304b\u3089\u8abf\u3079\u3088\u3046\u3068\u3057\u3066\u3044\u308b\u6b63\u89e3\u305d\u306e\u3082\u306e<\/strong>\u3060\u304b\u3089\u3067\u3059\u3002<\/p>\n
            \u307e\u3055\u306b\u300c\u9d8f\u304c\u5148\u304b\u3001\u5375\u304c\u5148\u304b\u300d\u306e\u30eb\u30fc\u30d7\u3067\u3059\u3002\u3053\u306e\u77db\u76fe\u3092\u81ea\u529b\u3067\u3001\u3057\u304b\u3082\u5168\u4e16\u754c\u306e\u30eb\u30fc\u30eb\u306b\u5bfe\u3057\u3066\u6b63\u78ba\u306b\u89e3\u304f\u30ed\u30b8\u30c3\u30af\u3092\u7d44\u3080\u306e\u306f\u3001\u6d41\u77f3\u306b\u30ea\u30b9\u30af\u304c\u9ad8\u3044\u3068\u5224\u65ad\u3057\u307e\u3057\u305f\u3002<\/p>\n
            \u307e\u3068\u3081\uff1a\u7d20\u76f4\u306b\u8ae6\u3081\u3066\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u3046\u6c7a\u65ad<\/h2>\n
            \u6700\u7d42\u7684\u306b\u3001\u79c1\u304c\u610f\u5730\u306b\u306a\u3063\u3066\u53d6\u308a\u7d44\u3093\u3067\u3044\u305f\u30b3\u30fc\u30c9\u306f\u3001\u6700\u592726\u6642\u9593\u3068\u3044\u3046\u4e16\u754c\u306e\u6642\u5dee\u306e\u30b9\u30b1\u30fc\u30eb\u306e\u524d\u306b\u3001\u3042\u3063\u3051\u306a\u304f\u5d29\u308c\u53bb\u308a\u307e\u3057\u305f\u3002<\/p>\n
            JavaScript\u306e\u6a19\u6e96\u6a5f\u80fd\uff08Date<\/code> \u3068 Intl<\/code>\uff09\u306e\u7d44\u307f\u5408\u308f\u305b\u3060\u3051\u3067\u3001\u4e16\u754c\u4e2d\u304b\u3089\u306e\u30a2\u30af\u30bb\u30b9\u3092\u60f3\u5b9a\u3057\u305f\u6b63\u78ba\u306a\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u8a08\u7b97\u3092\u6a19\u6e96\u6a5f\u80fd\u3060\u3051\u3067\u5b8c\u74a7\u306b\u51e6\u7406\u3059\u308b\u306e\u306f\u3001\u601d\u308f\u306c\u30d0\u30b0\u3092\u751f\u3080\u30ea\u30b9\u30af\u304c\u9ad8\u304f\u3001\u975e\u5e38\u306b\u56f0\u96e3\u3060\u3068\u3044\u3046\u7d50\u8ad6\u306b\u81f3\u308a\u307e\u3057\u305f\u3002<\/p>\n
            \u6a19\u6e96\u6a5f\u80fd\u3060\u3051\u3067\u4f55\u3068\u304b\u89e3\u6c7a\u3057\u3088\u3046\u3068\u91cd\u306d\u3066\u304d\u305f\u5de5\u592b\u3068\u52aa\u529b\u306b\u306f\u3053\u3053\u3067\u533a\u5207\u308a\u3092\u3064\u3051\u3001\u7d20\u76f4\u306b\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u529b\u3092\u501f\u308a\u308b\u3053\u3068\u306b\u3057\u307e\u3057\u305f\u3002
            \n\u6b21\u56de\u306f\u3001\u3053\u3046\u3057\u305f\u8907\u96d1\u306a\u5b9f\u884c\u74b0\u5883\u306e\u5dee\u7570\u306b\u3088\u308b\u30d0\u30b0\u3092\u6839\u672c\u304b\u3089\u89e3\u6c7a\u3057\u3001\u5b89\u5168\u304b\u3064\u6b63\u78ba\u306b\u6642\u5dee\u8a08\u7b97\u3092\u884c\u3063\u3066\u304f\u308c\u308b\u5f37\u529b\u306a\u30e9\u30a4\u30d6\u30e9\u30ea date-fns-tz<\/code> \u3092\u4f7f\u3063\u305f\u5b9f\u88c5\u65b9\u6cd5\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n
            <\/p>","protected":false},"author":2,"featured_media":0,"template":"","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"class_list":["post-10258","blog","type-blog","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/randyapps.com\/ja\/wp-json\/wp\/v2\/blog\/10258","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/randyapps.com\/ja\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/randyapps.com\/ja\/wp-json\/wp\/v2\/types\/blog"}],"author":[{"embeddable":true,"href":"https:\/\/randyapps.com\/ja\/wp-json\/wp\/v2\/users\/2"}],"wp:attachment":[{"href":"https:\/\/randyapps.com\/ja\/wp-json\/wp\/v2\/media?parent=10258"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}