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@lassy(Yoshihiko Terashi)

日付フォーマット文字列チートシート

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DateクラスやTimeクラスのstrftimeメソッドの引数で指定するフォーマットを自分用にメモ。
サンプルとして使用する日付は「2014年12月22日(月) 12:34:56 JST」とします。

フォーマット文字列 結果 主な用途や使用例
%Y-%m-%d %H:%M:%S 2014-12-22 12:34:56 MySQLのdatetime
%Y-%m-%dT%H:%M:%S%z 2014-12-22T15:32:04+0900 RSS1.0の<dc:date>タグ
%a, %d %b %Y %H:%M:%S %z Mon, 22 Dec 2014 15:32:04 +0900 RSS2.0の<pubDate>タグ
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