hirose31 https://blog.hatena.ne.jp/hirose31/ （ひ）メモ https://hirose31.hatenablog.jp/ ☹ $ perl -MTime::Piece -MTime::Seconds -e 'warn +((localtime) - ONE_MONTH)->strftime("%Y-%m-%d %T")' 2011-01-30 01:04:35 at -e line 1.☺ $ perl -MTime::Piece -e 'warn +(localtime)->add_months(-1)->strftime("%Y-%m-%d %T")' 2011-02-01 11:40:28 at -e line 1. 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhirose31.hatenablog.jp%2Fentry%2F20110301%2F1298946936" title=" Happy March!! - （ひ）メモ" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2011-03-01 11:35:36 rich https://hirose31.hatenablog.jp/entry/20110301/1298946936 1.0 100%