{"id":10326,"date":"2026-03-22T01:43:37","date_gmt":"2026-03-21T16:43:37","guid":{"rendered":"https:\/\/randyapps.com\/?post_type=blog&#038;p=10326"},"modified":"2026-03-22T01:53:54","modified_gmt":"2026-03-21T16:53:54","slug":"10326","status":"publish","type":"blog","link":"https:\/\/randyapps.com\/ja\/blog\/10326","title":{"rendered":"\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u77ed\u7e2e\u540d\u306b\u306f\u300c\u53b3\u5bc6\u306a\u4e16\u754c\u6a19\u6e96\u300d\u304c\u306a\u3044\uff1f"},"content":{"rendered":"<p>\u30a2\u30d7\u30ea\u3067\u73fe\u5728\u6642\u523b\u3092\u8868\u793a\u3059\u308b\u969b\u3001\u300cJST\uff08\u65e5\u672c\u6a19\u6e96\u6642\uff09\u300d\u3084\u300cEST\uff08\u6771\u90e8\u6a19\u6e96\u6642\uff09\u300d\u3068\u3044\u3063\u305f\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u77ed\u7e2e\u540d\uff08Abbreviation\uff09\u3092\u4f7f\u3046\u3053\u3068\u304c\u591a\u3044\u3068\u601d\u3044\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u5b9f\u306f\u3053\u308c\u3089\u306e\u77ed\u7e2e\u540d\u306b\u306f\u3001\u4e16\u754c\u7684\u306b\u7d71\u4e00\u3055\u308c\u305f\u5358\u4e00\u306e\u53b3\u5bc6\u306a\u898f\u683c\u304c\u5b58\u5728\u3057\u307e\u305b\u3093\u3002<\/p>\n<p>\u6975\u7aef\u306a\u8a71\u3001\u5404\u5730\u57df\u3084\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u304c\u6163\u7fd2\u7684\u306b\u4f7f\u3063\u3066\u3044\u308b\u3060\u3051\u306e\u540d\u524d\u3067\u3042\u308a\u3001\u91cd\u8907\u3059\u3089\u5b58\u5728\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u300cCST\u300d\u3068\u3044\u3046\u5168\u304f\u540c\u3058\u77ed\u7e2e\u540d\u3067\u3042\u3063\u3066\u3082\u3001\u5b9f\u969b\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8907\u6570\u306e\u7570\u306a\u308b\u5730\u57df\u306e\u6642\u9593\u5e2f\uff08\u3068\u3001\u305d\u306e\u82f1\u8a9e\u306e\u6b63\u5f0f\u540d\u79f0\uff09\u3092\u6307\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u7c73\u56fd\u4e2d\u90e8\u6a19\u6e96\u6642<\/strong>\uff08Central Standard Time\uff1aUTC-6\uff09<\/li>\n<li><strong>\u4e2d\u56fd\u6a19\u6e96\u6642<\/strong>\uff08China Standard Time\uff1aUTC+8\uff09<\/li>\n<li><strong>\u30ad\u30e5\u30fc\u30d0\u6a19\u6e96\u6642<\/strong>\uff08Cuba Standard Time\uff1aUTC-5\uff09<\/li>\n<\/ul>\n<p>\u3053\u306e\u3088\u3046\u306b\u3001\u6642\u5dee\u304c\u5168\u304f\u7570\u306a\u308b\u5730\u57df\u3067\u3042\u3063\u3066\u3082\u3001\u982d\u6587\u5b57\u3092\u53d6\u308b\u3068\u3059\u3079\u3066\u300cCST\u300d\u3068\u3057\u3066\u30b7\u30b9\u30c6\u30e0\u4e0a\u3067\u885d\u7a81\u3057\u3066\u3057\u307e\u3046\u308f\u3051\u3067\u3059\u3002<\/p>\n<h3>\u8fd1\u5e74\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u52d5\u5411\uff1a\u77ed\u7e2e\u540d\u304b\u3089\u30aa\u30d5\u30bb\u30c3\u30c8\u8868\u793a\u3078<\/h3>\n<p>\u3053\u3046\u3057\u305f\u540d\u524d\u306e\u66d6\u6627\u3055\u3082\u3042\u308a\u3001\u6700\u8fd1\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3084\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u306f\u3001\u77ed\u7e2e\u540d\u3092\u53d6\u5f97\u3057\u3088\u3046\u3068\u3057\u3066\u3082\u300cGMT+9\u300d\u3084\u300cUTC-05:00\u300d\u306e\u3088\u3046\u306a\u3001\u5358\u306a\u308b\u6642\u5dee\uff08\u30aa\u30d5\u30bb\u30c3\u30c8\uff09\u304c\u8fd4\u3055\u308c\u308b\u3053\u3068\u304c\u4e3b\u6d41\u306b\u306a\u3063\u3066\u304d\u3066\u3044\u307e\u3059\uff08\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u6307\u5b9a\u3084\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u3088\u3063\u3066\u5f62\u5f0f\u306f\u7570\u306a\u308a\u307e\u3059\uff09\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001JavaScript\u306e\u6a19\u6e96\u6a5f\u80fd\u3067\u3042\u308b <code>Intl.DateTimeFormat<\/code> \u3092\u4f7f\u3063\u3066\u3001\u77ed\u3044\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u540d\uff08<code>timeZoneName: 'short'<\/code>\uff09\u3092\u53d6\u5f97\u3059\u308b\u30b3\u30fc\u30c9\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre><code class=\"language-javascript\">\/\/ \u6307\u5b9a\u3057\u305f\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u77ed\u3044\u540d\u524d\u3092\u53d6\u5f97\u3059\u308b\u30d8\u30eb\u30d1\u30fc\u95a2\u6570\r\nfunction getShortTzName(ianaTimeZone) {\r\n\u00a0 \u00a0 const formatter = new Intl.DateTimeFormat('ja-JP', {\r\n\u00a0 \u00a0 \u00a0 \u00a0 timeZone: ianaTimeZone,\r\n\u00a0 \u00a0 \u00a0 \u00a0 timeZoneName: 'short'\r\n\u00a0 \u00a0 });\r\n\u00a0 \u00a0 const parts = formatter.formatToParts(new Date());\r\n\u00a0 \u00a0 return parts.find(part =&gt; part.type === 'timeZoneName').value;\r\n}\r\n\r\n\/\/ \u30d1\u30bf\u30fc\u30f31: \u304b\u3064\u3066\u306f\u671f\u5f85\u901a\u308a\u306b\u30a2\u30eb\u30d5\u30a1\u30d9\u30c3\u30c8\u306e\u7565\u79f0\u304c\u8fd4\u3063\u3066\u3044\u305f\u30b1\u30fc\u30b9\r\n\/\/ \uff08\u203b\u6700\u8fd1\u306e\u30d6\u30e9\u30a6\u30b6\u3067\u306f\u3001\u6771\u4eac\u3092\u6307\u5b9a\u3057\u3066\u3082 \"GMT+9\" \u304c\u8fd4\u308b\u74b0\u5883\u304c\u5897\u3048\u3066\u3044\u307e\u3059\uff09\r\nconsole.log(getShortTzName('Asia\/Tokyo'));\u00a0\r\n\/\/ \u51fa\u529b\u4f8b: \"JST\" \u307e\u305f\u306f \"GMT+9\"\r\n\r\n\/\/ \u30d1\u30bf\u30fc\u30f32: \u7565\u79f0\u3067\u306f\u306a\u304f\u3001GMT\u30aa\u30d5\u30bb\u30c3\u30c8\u304c\u8fd4\u3063\u3066\u3057\u307e\u3046\u30b1\u30fc\u30b9\r\nconsole.log(getShortTzName('Asia\/Dubai'));\u00a0\r\n\/\/ \u51fa\u529b: \"GMT+4\" (\u672c\u6765\u306a\u3089 \"GST\" \u306a\u3069\u3092\u671f\u5f85\u3057\u305f\u3044\u3068\u3053\u308d)\r\n<\/code><\/pre>\n<p>\u3053\u306e\u3088\u3046\u306b\u3001\u307e\u3063\u305f\u304f\u540c\u3058\u8a2d\u5b9a\uff08\u8a00\u8a9e\u3084\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6307\u5b9a\uff09\u3067\u547c\u3073\u51fa\u3057\u3066\u3044\u308b\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001<strong>\u6307\u5b9a\u3059\u308b\u90fd\u5e02\uff08\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\uff09\u306b\u3088\u3063\u3066\u300cJST\u300d\u306e\u3088\u3046\u306a\u898b\u6163\u308c\u305f\u7565\u79f0\u304c\u8fd4\u3063\u3066\u304f\u308b\u3053\u3068\u3082\u3042\u308c\u3070\u3001\u300cGMT+4\u300d\u306e\u3088\u3046\u306b\u5358\u306a\u308b\u6642\u5dee\u304c\u8fd4\u3063\u3066\u304f\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/strong><\/p>\n<p><strong>\u203b\u8ffd\u8a18\uff1a<\/strong> \u4ee5\u524d\u306f\u3069\u3093\u306a\u30ed\u30b1\u30fc\u30eb\u3067\u3082 <code>Asia\/Tokyo<\/code> \u3092\u6307\u5b9a\u3059\u308c\u3070\u300cJST\u300d\u304c\u53d6\u5f97\u3067\u304d\u3066\u3044\u305f\u6c17\u304c\u3059\u308b\u306e\u3067\u3059\u304c\u3001\u6700\u8fd1\u306e\u30d6\u30e9\u30a6\u30b6\u3067\u306f\u3001\u3088\u308a\u53b3\u5bc6\u306a\u8868\u793a\u3092\u512a\u5148\u3057\u3066\u304b\u3001\u6771\u4eac\u3067\u3082\u300cGMT+9\u300d\u3068\u8fd4\u3055\u308c\u308b\u30b1\u30fc\u30b9\u304c\u76ee\u7acb\u3064\u3088\u3046\u306b\u306a\u3063\u3066\u304d\u307e\u3057\u305f\u3002\u3082\u306f\u3084\u6a19\u6e96\u6a5f\u80fd\u3060\u3051\u3067\u30a2\u30eb\u30d5\u30a1\u30d9\u30c3\u30c8\u306e\u7565\u79f0\u3092\u5b89\u5b9a\u3057\u3066\u5f97\u308b\u3053\u3068\u306f\u3001\u975e\u5e38\u306b\u56f0\u96e3\u306b\u306a\u308a\u3064\u3064\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u30b7\u30b9\u30c6\u30e0\u3068\u3057\u3066\u6b63\u78ba\u6027\u3092\u671f\u3059\u305f\u3081\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u5074\u306e\u914d\u616e\uff08\u5b89\u5168\u306a\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\uff09\u3067\u306f\u3042\u308b\u306e\u3067\u3059\u304c\u3001\u79c1\u305f\u3061\u958b\u767a\u8005\u304b\u3089\u3059\u308b\u3068\u3001\u30e6\u30fc\u30b6\u30fc\u306b\u89aa\u3057\u307f\u3084\u3059\u3044\u300cEST\u300d\u3084\u300cJST\u300d\u3068\u3044\u3063\u305f\u77ed\u7e2e\u540d\u3092\u30a2\u30d7\u30ea\u306eUI\u306b\u4e00\u8cab\u3057\u3066\u8868\u793a\u3059\u308b\u306e\u304c\u3001\u6a19\u6e96\u6a5f\u80fd\u3060\u3051\u3067\u306f\u975e\u5e38\u306b\u56f0\u96e3\u306b\u306a\u3063\u3066\u3044\u308b\u306e\u304c\u5b9f\u60c5\u3067\u3059\u3002<\/p>\n<h3>\u306a\u305c\u300cEST\u300d\u306a\u3069\u306e\u540d\u524d\u3060\u3051\u3067\u6642\u9593\u3092\u7ba1\u7406\u3067\u304d\u306a\u3044\u306e\u304b\uff1f<\/h3>\n<p>\u6642\u5dee\u8a08\u7b97\u30a2\u30d7\u30ea\u306a\u3069\u3092\u958b\u767a\u3057\u3066\u3044\u308b\u3068\u3001\u30a2\u30d7\u30ea\u5185\u306e\u8ffd\u52a0\u3067\u304d\u308b\u90fd\u5e02\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u5bfe\u3057\u3066\u3001\u30e6\u30fc\u30b6\u30fc\u304b\u3089\u300c\u90fd\u5e02\u540d\u3060\u3051\u3067\u306a\u304f\u3001&#8221;EST (Eastern Standard Time)&#8221; \u306a\u3069\u306e\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u540d\u3082\u767b\u9332\u3057\u3066\u9078\u3079\u308b\u3088\u3046\u306b\u3057\u3066\u307b\u3057\u3044\u300d\u3068\u3044\u3046\u8981\u671b\u3092\u3044\u305f\u3060\u304f\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u76f4\u611f\u7684\u3067\u3068\u3066\u3082\u81ea\u7136\u306a\u8981\u671b\u3067\u3059\u3088\u306d\u3002<\/p>\n<p>\u6280\u8853\u7684\u306b\u306f\u300cEST\u300d\u3092\u5358\u306a\u308b\u56fa\u5b9a\u306e\u6642\u5dee\uff08UTC-5\uff09\u3068\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u767b\u9332\u3059\u308b\u3053\u3068\u81ea\u4f53\u306f\u53ef\u80fd\u3067\u3059\u3002\u3057\u304b\u3057\u3001<strong>\u4e16\u754c\u6642\u8a08\u306e\u3088\u3046\u306a\u300c\u7279\u5b9a\u306e\u5834\u6240\u306e\u6b63\u78ba\u306a\u6642\u9593\u3092\u77e5\u308b\u300d\u3068\u3044\u3046\u30a2\u30d7\u30ea\u306e\u7528\u9014\u3092\u8003\u3048\u308b\u3068\u3001\u300cEST\u300d\u3068\u3044\u3046\u540d\u524d\u3060\u3051\u3067\u6642\u9593\u3092\u7ba1\u7406\u30fb\u63d0\u4f9b\u3059\u308b\u306e\u306f\u9069\u5207\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/strong>\u305d\u306e\u6700\u5927\u306e\u7406\u7531\u306f<strong>\u300c\u30b5\u30de\u30fc\u30bf\u30a4\u30e0\uff08DST\uff1aDaylight Saving Time\uff09\u300d\u306e\u5b58\u5728<\/strong>\u3067\u3059\u3002<\/p>\n<p>\u5177\u4f53\u7684\u306a\u4f8b\u3092\u6319\u3052\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u30a2\u30e1\u30ea\u30ab\u306e\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\u306e\u6642\u9593\u3092\u77e5\u308a\u305f\u3044\u3068\u3057\u307e\u3059\u3002\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\u306f\u51ac\u306e\u9593\u306f\u300cEST\uff08Eastern Standard Time\uff1a\u6771\u90e8\u6a19\u6e96\u6642\uff09\u300d\u3067\u3059\u304c\u3001\u590f\u306b\u306a\u308b\u3068\u6642\u8a08\u306e\u91dd\u304c\u9032\u307f\u300cEDT\uff08Eastern Daylight Time\uff1a\u6771\u90e8\u590f\u6642\u9593\uff09\u300d\u306b\u5207\u308a\u66ff\u308f\u308a\u307e\u3059\u3002<\/p>\n<p>\u3082\u3057\u30a2\u30d7\u30ea\u5074\u304c\u30e6\u30fc\u30b6\u30fc\u306e\u8981\u671b\u901a\u308a\u300cEST\u300d\u3068\u3044\u3046\u56fa\u5b9a\u306e\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u3068\u3057\u3066\u8ffd\u52a0\u30fb\u4fdd\u5b58\u3057\u3066\u3057\u307e\u3063\u305f\u5834\u5408\u3001\u590f\u306b\u306a\u3063\u3066\u3082\u300cEST\u300d\u306e\u307e\u307e\u6642\u5dee\u304c\u5207\u308a\u66ff\u308f\u3089\u305a\u3001\u672c\u6765\u77e5\u308a\u305f\u3044\u306f\u305a\u306e\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\u306e\u73fe\u5728\u6642\u523b\u3068\u306f\u30ba\u30ec\u304c\u751f\u3058\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p>\u3055\u3089\u306b\u5384\u4ecb\u306a\u3053\u3068\u306b\u3001<strong>\u540c\u3058\u300cEST\u300d\u3068\u3044\u3046\u62ec\u308a\u3067\u3042\u3063\u3066\u3082\u3001\u90fd\u5e02\u3084\u5730\u57df\u306b\u3088\u3063\u3066EST\u3068EDT\u3092\u3044\u3064\u5207\u308a\u66ff\u3048\u308b\u304b\u306e\u30eb\u30fc\u30eb\u304c\u7570\u306a\u3063\u305f\u308a\u3001\u305d\u3082\u305d\u3082\u5207\u308a\u66ff\u3048\u306a\u3044\u5730\u57df\u304c\u5b58\u5728\u3057\u305f\u308a\u3057\u307e\u3059\u3002<\/strong>\u4f8b\u3048\u3070\u3001\u30b8\u30e3\u30de\u30a4\u30ab\u3084\u30d1\u30ca\u30de\u306a\u3069\u306f\u3001\u5e74\u9593\u3092\u901a\u3058\u3066\u305a\u3063\u3068UTC-5\uff08EST\uff09\u3092\u63a1\u7528\u3057\u3001\u30b5\u30de\u30fc\u30bf\u30a4\u30e0\u3092\u5c0e\u5165\u3057\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n<p>\u6642\u5dee\u8a08\u7b97\u30a2\u30d7\u30ea\u306a\u3069\u306e\u4e3b\u76ee\u7684\u306f\u3001\u300c\u3068\u3042\u308b\u5834\u6240\u306e\u4eca\u306e\u6642\u9593\u304c\u3001\u4f55\u6642\u4f55\u5206\u306a\u306e\u304b\u3092\u77e5\u308a\u305f\u3044\u300d\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3088\u306d\u3002\u3057\u304b\u3057\u3001\u300cEST\u3068\u3057\u3066\u8ffd\u52a0\u3059\u308b\u300d\u3068\u3044\u3046\u60c5\u5831\u3060\u3051\u3067\u306f\u3001\u305d\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u300c\u30b5\u30de\u30fc\u30bf\u30a4\u30e0\u304c\u3042\u308b\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\u300d\u306e\u6642\u9593\u3092\u77e5\u308a\u305f\u3044\u306e\u304b\u3001\u300c\u30b5\u30de\u30fc\u30bf\u30a4\u30e0\u304c\u306a\u3044\u30b8\u30e3\u30de\u30a4\u30ab\u300d\u306e\u6642\u9593\u3092\u77e5\u308a\u305f\u3044\u306e\u304b\u30b7\u30b9\u30c6\u30e0\u306b\u306f\u5224\u65ad\u3067\u304d\u307e\u305b\u3093\u3002\u7d50\u679c\u3068\u3057\u3066\u3001\u6b63\u78ba\u306a\u6642\u9593\u3092\u63d0\u793a\u3059\u308b\u3068\u3044\u3046\u4e3b\u76ee\u7684\u3092\u679c\u305f\u305b\u306a\u304f\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p>\u3055\u3089\u306b\u8e0f\u307f\u8fbc\u3080\u3068\u3001<strong>\u300c\u904e\u53bb\u3084\u672a\u6765\u306e\u30eb\u30fc\u30eb\u306e\u5909\u66f4\u300d<\/strong>\u3068\u3044\u3046\u554f\u984c\u3082\u3042\u308a\u307e\u3059\u3002\u56fd\u3084\u5730\u57df\u306b\u3088\u3063\u3066\u306f\u3001\u3042\u308b\u5e74\u304b\u3089\u7a81\u7136\u30b5\u30de\u30fc\u30bf\u30a4\u30e0\u3092\u5ec3\u6b62\u3057\u305f\u308a\u3001\u6a19\u6e96\u6642\u306e\u30aa\u30d5\u30bb\u30c3\u30c8\u81ea\u4f53\u3092\u5909\u66f4\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3064\u307e\u308a\u3001\u300c\u7279\u5b9a\u306e\u5834\u6240\u306e\u3001\u5e74\u9593\u3092\u901a\u3057\u305f\u6b63\u78ba\u306a\u6642\u9593\uff08\u904e\u53bb\u304b\u3089\u672a\u6765\u306b\u308f\u305f\u308b\u6b63\u78ba\u306a\u6642\u9593\uff09\u300d\u3092\u77e5\u308a\u305f\u3044\u5834\u5408\u306f\u3001\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u77ed\u7e2e\u540d\u3067\u306f\u306a\u304f\u3001\u5fc5\u305a\u300cAmerica\/New_York\u300d\u306e\u3088\u3046\u306a<strong>\u90fd\u5e02\u30fb\u5730\u57df\u540d\uff08IANA\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u540d\uff09<\/strong>\u3092\u30d9\u30fc\u30b9\u306b\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u306e\u3067\u3059\u3002\u90fd\u5e02\u540d\u304c\u6c7a\u307e\u3063\u3066\u521d\u3081\u3066\u3001\u4eca\u306f\u590f\u3060\u304b\u3089EDT\u3001\u51ac\u3060\u304b\u3089EST\u3001\u3042\u308b\u3044\u306f\u300c\u3053\u306e\u5730\u57df\u306f\u305a\u3063\u3068\u30b5\u30de\u30fc\u30bf\u30a4\u30e0\u304c\u306a\u3044\u304b\u3089EST\u306e\u307e\u307e\u300d\u3068\u3044\u3046\u6b63\u78ba\u306a\u5224\u5b9a\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>\u72ec\u81ea\u306e\u77ed\u7e2e\u540d\u5224\u5b9a\u30b3\u30fc\u30c9\u306e\u5b9f\u88c5\u4f8b<\/h3>\n<p>\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u304c\u89aa\u5207\u306a\u77ed\u7e2e\u540d\u3092\u5b89\u5b9a\u3057\u3066\u8fd4\u3057\u3066\u304f\u308c\u306a\u3044\u4ee5\u4e0a\u3001\u4e00\u822c\u7684\u306b\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u3067\u3042\u308d\u3046\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u77ed\u7e2e\u540d\u3092\u74b0\u5883\u306b\u4f9d\u5b58\u305b\u305a\u306b\u8868\u793a\u3057\u305f\u3044\u5834\u5408\u306f\u3001\u30a2\u30d7\u30ea\u5074\u3067\u72ec\u81ea\u306b\u77ed\u7e2e\u540d\u3092\u6c7a\u5b9a\u3059\u308b\u30a2\u30d7\u30ed\u30fc\u30c1\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u3053\u3067\u306f\u3001IANA\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u540d\u3068\u73fe\u5728\u306e\u30aa\u30d5\u30bb\u30c3\u30c8\uff08\u6642\u5dee\uff09\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u300c\u30ad\u30fc\u300d\u3092\u4f5c\u308a\u3001\u305d\u3053\u304b\u3089\u6b63\u78ba\u306a\u77ed\u7e2e\u540d\u3092\u5c0e\u304d\u51fa\u3059\u5358\u7d14\u5316\u3055\u308c\u305fJavaScript\u306e\u30b3\u30fc\u30c9\u4f8b\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">\/**\r\n * \u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u540d(IANA)\u3068\u73fe\u5728\u306e\u30aa\u30d5\u30bb\u30c3\u30c8\u6642\u9593\u304b\u3089\u77ed\u7e2e\u540d\u3092\u6c7a\u5b9a\u3059\u308b\r\n * \u203b offsetMinutes\u306f JavaScript\u306e getTimezoneOffset() \u306e\u4ed5\u69d8\u306b\u5408\u308f\u305b\u3001\r\n * UTC\u3088\u308a\u9032\u3093\u3067\u3044\u308b\u5730\u57df\u3092\u30de\u30a4\u30ca\u30b9\u3001\u9045\u308c\u3066\u3044\u308b\u5730\u57df\u3092\u30d7\u30e9\u30b9\u3068\u3057\u3066\u3044\u307e\u3059\u3002\r\n *\/\r\nfunction getCustomTimezoneAbbr(ianaTimeZone, offsetMinutes) {\r\n    \/\/ \u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u540d\u3068\u30aa\u30d5\u30bb\u30c3\u30c8\uff08\u5206\uff09\u3092\u7d50\u5408\u3057\u3066\u4e00\u610f\u306e\u30ad\u30fc\u3092\u4f5c\u6210\r\n    const key = `${ianaTimeZone}_${offsetMinutes}`;\r\n\r\n    \/\/ \u72ec\u81ea\u306e\u30de\u30c3\u30d4\u30f3\u30b0\u8f9e\u66f8\uff08\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u62e1\u5f35\u3057\u307e\u3059\uff09\r\n    const abbrMap = {\r\n        'Asia\/Tokyo_-540': 'JST',      \/\/ UTC+9\r\n        'America\/New_York_300': 'EST', \/\/ UTC-5 (\u51ac: \u6a19\u6e96\u6642)\r\n        'America\/New_York_240': 'EDT', \/\/ UTC-4 (\u590f: \u30b5\u30de\u30fc\u30bf\u30a4\u30e0)\r\n        'Europe\/London_0': 'GMT',      \/\/ UTC\u00b10 (\u51ac: \u6a19\u6e96\u6642)\r\n        'Europe\/London_-60': 'BST'     \/\/ UTC+1 (\u590f: \u30b5\u30de\u30fc\u30bf\u30a4\u30e0)\r\n    };\r\n\r\n    \/\/ \u30de\u30c3\u30d4\u30f3\u30b0\u304c\u5b58\u5728\u3059\u308c\u3070\u77ed\u7e2e\u540d\u3092\u8fd4\u3057\u3001\u306a\u3051\u308c\u3070\u6c4e\u7528\u7684\u306aGMT\u30aa\u30d5\u30bb\u30c3\u30c8\u3092\u8fd4\u3059\r\n    if (abbrMap[key]) {\r\n        return abbrMap[key];\r\n    } else {\r\n        const sign = offsetMinutes &gt; 0 ? '-' : '+';\r\n        const hours = Math.floor(Math.abs(offsetMinutes) \/ 60);\r\n        return `GMT${sign}${hours.toString().padStart(2, '0')}:00`;\r\n    }\r\n}\r\n\r\n\/\/ \u5b9f\u884c\u4f8b\uff08\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\u306e\u51ac\uff09\r\nconsole.log(getCustomTimezoneAbbr('America\/New_York', 300)); \/\/ \"EST\"\u304c\u51fa\u529b\u3055\u308c\u308b\r\n\r\n\/\/ \u5b9f\u884c\u4f8b\uff08\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\u306e\u590f\uff09\r\nconsole.log(getCustomTimezoneAbbr('America\/New_York', 240)); \/\/ \"EDT\"\u304c\u51fa\u529b\u3055\u308c\u308b\r\n<\/code><\/pre>\n<p>\u3053\u306e\u624b\u6cd5\u306a\u3089\u3001\u540c\u3058\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\u3092\u6307\u5b9a\u3057\u3066\u3044\u3066\u3082\u300c\u73fe\u5728\u306e\u30aa\u30d5\u30bb\u30c3\u30c8\u304c-5\u6642\u9593\uff08300\u5206\uff09\u306a\u3089EST\u300d\u300c-4\u6642\u9593\uff08240\u5206\uff09\u306a\u3089EDT\u300d\u3068\u3001\u5b63\u7bc0\u306b\u5fdc\u3058\u3066\u6b63\u78ba\u306b\u77ed\u7e2e\u540d\u3092\u51fa\u3057\u5206\u3051\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u5168\u3066\u306e\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u3068\u30aa\u30d5\u30bb\u30c3\u30c8\u306e\u7d44\u307f\u5408\u308f\u305b\u306e\u72ec\u81ea\u30de\u30c3\u30d4\u30f3\u30b0\u8f9e\u66f8\u3092\u4f5c\u6210\u3059\u308b\u306e\u306f\u304b\u306a\u308a\u5927\u5909\u3067\u3059\u304c\u3001\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u77ed\u7e2e\u540d\u306e\u4e16\u754c\u6a19\u6e96\u306e\u898f\u683c\u304c\u6c7a\u307e\u3063\u3066\u304a\u3089\u305a\u3001\u30e9\u30a4\u30d6\u30e9\u30ea\u304c\u5bfe\u5fdc\u3057\u3066\u304f\u308c\u3066\u3044\u306a\u3044\u4ee5\u4e0a\u3001\u4eca\u306e\u3068\u3053\u308d\u306f\u3053\u306e\u69d8\u306a\u65b9\u6cd5\u3067\u9811\u5f35\u308b\u3057\u304b\u7121\u3044\u3068\u3044\u3046\u306e\u304c\u5b9f\u60c5\u3067\u3059\u3002<\/p>\n<p>\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u6271\u3044\u306f\u5965\u304c\u6df1\u304f\u3001\u30eb\u30fc\u30eb\u306e\u5909\u66f4\u3068\u3044\u3046\u6b74\u53f2\u7684\u306a\u80cc\u666f\u3082\u7d61\u3093\u3067\u304d\u307e\u3059\u3002\u5185\u90e8\u3067\u306f\u3057\u3063\u304b\u308a\u300c\u90fd\u5e02\uff08IANA\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u540d\uff09\u300d\u3067\u7ba1\u7406\u3057\u3064\u3064\u3001\u8868\u793a\u5c64\u3067\u306f\u72ec\u81ea\u306e\u30de\u30c3\u30d4\u30f3\u30b0\u3067\u30e6\u30fc\u30b6\u30fc\u306b\u5bc4\u308a\u6dfb\u3046\u3001\u3068\u3044\u3046\u5de5\u592b\u304c\u30a2\u30d7\u30ea\u306e\u4f7f\u3044\u52dd\u624b\u3092\u5927\u304d\u304f\u5411\u4e0a\u3055\u305b\u308b\u30dd\u30a4\u30f3\u30c8\u306b\u306a\u308a\u305d\u3046\u3067\u3059\u3002<\/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-10326","blog","type-blog","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/randyapps.com\/ja\/wp-json\/wp\/v2\/blog\/10326","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=10326"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}