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\u6700\u521d\u306b30 = 1901\u5e7412\u670813\u65e5\u3002 UNIX\u30b7\u30b9\u30c6\u30e0\u3082\u7d44\u307f\u8fbc\u307f\u30b7\u30b9\u30c6\u30e0\u306b\u5e83\u304c\u3063\u3066\u3044\u308b\u305f\u3081\u3001\u4e00\u90e8\u306e\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306b\u306f\u300132\u30d3\u30c3\u30c8\u30d7\u30ed\u30bb\u30c3\u30b5\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u7528\u306e32\u30d3\u30c3\u30c8\u30d7\u30ed\u30bb\u30c3\u30b5\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306e\u5b9a\u7fa9\u3082\u3042\u308a\u307e\u3059\u3002 time_t 64\u30d3\u30c3\u30c8\u306b\u5909\u63db\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u308c\u306f\u30012012\u5e74\u306eNetBSD\u306e\u30d0\u30fc\u30b8\u30e7\u30f36.0\u30012014\u5e74\u306e\u30d0\u30fc\u30b8\u30e7\u30f35.5\u3001OpenBSD\u306eLinux\u3067\u3059\u3002 [4] [5] [6] \u305f\u3060\u3057\u3001\u53e4\u3044\u30d0\u30a4\u30ca\u30ea\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306f\u901a\u5e38\u6b8b\u3063\u3066\u3044\u308b\u305f\u3081\u3001\u65b0\u3057\u3044\u7ffb\u8a33\u304c\u5fc5\u8981\u3067\u3059\u3002\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30ec\u30d9\u30eb\u3067\u306f\u300164\u30d3\u30c3\u30c8\u306e\u4ee3\u66ff\u54c1\u306e\u4f7f\u7528\u304c\u3059\u3067\u306b\u63d0\u6848\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002 [7] [8] [9] GNU-C\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u306f\u3001\u5207\u308a\u66ff\u3048\u306e\u305f\u3081\u306e1\u3064\u304c\u3042\u308a\u307e\u3057\u305f time64_t \u5c0e\u5165\u3055\u308c\u305f\u5b9a\u7fa9\u3002 [\u5341] \u540c\u69d8\u306e\u5b9a\u7fa9 __time64_t Windows\u74b0\u5883\u3067\u4f7f\u7528\u3055\u308c\u3001VisualC ++ 2005\u3067\u30c7\u30d5\u30a9\u30eb\u30c8\u304c\u958b\u304b\u308c\u307e\u3057\u305f \u6642\u959364 \u304b\u308f\u3063\u305f\u3002 [11]        (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4\u5225\u306e\u6551\u6e08\u7b56\u306f\u3001UNIX\u30bf\u30a4\u30e0\u30ab\u30a6\u30f3\u30bf\u30fc\u304b\u3089\u65b0\u3057\u3044\u30bf\u30a4\u30e0\u30d9\u30fc\u30b9\u3078\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5909\u63db\u3067\u3059\u3002 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System.Datetime.Now.Ticks \uff081\u67081\u65e5\u4ee5\u964d\u306e64\u30d3\u30c3\u30c810\u30c6\u30eb\u30de\u30a4\u30af\u30ed\u79d2\u300129227\u5e74\u9593\u5341\u5206\u3067\u3059\uff09\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30d9\u30fc\u30b9\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306f\u3057\u3070\u3057\u3070\u4f7f\u7528\u3055\u308c\u307e\u3059 \u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7 -Database\u6a19\u6e96SQL92\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308bART\u5024\u306f\u3001\u30de\u30a4\u30af\u30ed\u79d2\uff08ODBC\/JDBC\u3067\u3082\u975e\u5e38\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u3059\uff09\u3068\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u306e\u8868\u73fe\u304c\u3001\u4e3b\u306b\u6bce\u65e5\u306e\u30ab\u30a6\u30f3\u30bf\u30fc\uff08SQL\u65e5\u4ed8\uff09\u304b\u3089\u8ddd\u96e2\u304c\u3042\u308a\u3001\u6bce\u65e5\u306e\u30ab\u30a6\u30f3\u30bf\u30fc\u304c32\u30d3\u30c3\u30c8\u306e\u7bc4\u56f2\u304c\u5927\u304d\u304f\u306a\u308a\u307e\u3059\uff08\u305f\u3060\u3057\u3001\u30c7\u30a4\u30ea\u30fc\u30e1\u30fc\u30bf\u30fc\u306e\u6839\u5e95\u306b\u3042\u308b\u30a8\u30dd\u30c3\u30af\u306f\u307e\u3063\u305f\u304f\u7570\u306a\u308a\u307e\u3059\uff09\u3002\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u306e\u3053\u308c\u3089\u306e\u30c7\u30fc\u30bf\u578b\u304c\u7d99\u7d9a\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3001Unixzeit\u30ab\u30a6\u30f3\u30bf\u30fc\u306e\u5236\u9650\u3092\u89e3\u6c7a\u3067\u304d\u307e\u3059\u3002 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UTC\u3001UNIX\u30d1\u30b9\u7528\u306b\u5143\u3005\u958b\u767a\u3055\u308c\u305fTIME\u540c\u671f\u30d7\u30ed\u30c8\u30b3\u30ebNTP\uff08\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bf\u30a4\u30e0\u30d7\u30ed\u30c8\u30b3\u30eb\uff09\u306e\u30ab\u30a6\u30f3\u30bf\u30fc\u3002\u3053\u306e\u554f\u984c\u306f\u3001\u6700\u65b0\u306e\u5b9f\u88c5\u3067\u89e3\u6c7a\u3055\u308c\u307e\u3059\uff08\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044 RFC 5905 \uff09\u3001\u3057\u304b\u3057\u3001\u591a\u304f\u306e\u30c7\u30d0\u30a4\u30b9\uff08\u7279\u306b\u7d44\u307f\u8fbc\u307f\u30b7\u30b9\u30c6\u30e0\uff09\u306f\u3001\u53e4\u3044\u6a19\u6e96\u306b\u5fdc\u3058\u3066\u6a5f\u80fd\u3057\u307e\u3059 RFC 868 \u3002 \u3053\u3053\u3067\u3082\u3001\u80cc\u666f\u306f\u300132\u30d3\u30c3\u30c8\u306e\u6570\u5b57\u3068\u3057\u3066\u306e\u6642\u9593\u4f1d\u9001\u304c\u6570\u79d2\u3067\u884c\u308f\u308c\u308b\u304c\u30011900\u5e741\u67081\u65e5\u300100:00:00 UTC\u306e\u958b\u59cb\u6642\u9593\u3067\u306f\u7f72\u540d\u3055\u308c\u3066\u3044\u306a\u3044\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002\u30b7\u30b9\u30c6\u30e0\u304c\u975e\u5e38\u306b\u304d\u308c\u3044\u306b\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3001\u8a08\u7b97\u4e2d\u306b\uff08\u3088\u308a\u5927\u304d\u306a\uff09\u554f\u984c\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u3053\u308c\u306f\u3001\u5fae\u5206\u6cd5\u3092\u4f7f\u7528\u3057\u3066\u6642\u9593\u540c\u671f\u304c\u6a5f\u80fd\u3059\u308b\u306f\u305a\u3067\u3042\u308b\u305f\u3081\u3067\u3059\u3002 [12\u756a\u76ee] [13] 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