æ¥ä»ãªãã¸ã§ã¯ã date = new Date(yead, month[, day[, hour[, min[, sec[, msec]]]]]) date = new Date(time) date = new Date(str) date = new Date() æå®ããæ¥æã表ãæ¥ä»ãªãã¸ã§ã¯ããçæãã¾ããæ㯠0ï½11 ã®ç¯å²ã§æå®ãã¦ãã ãããmsec 㯠JavaScript 1.3 ããå©ç¨ã§ãã¾ãã date = new Date(1999, 11); // => 1999-12-01 00:00:00.000 date = new Date(1999, 11, 31); // => 1999-12-31 00:00:00.000 date = new Date(1999, 11, 31, 23); // => 1999-12-31 23:00:00.000 date
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