おっさんは数字を覚えられない #おっさんのジャンク記憶
-e:1:in `<main>': undefined method `iso9601' for 2025-03-16 00:00:13 +0000:Time (NoMethodError)
puts Time.parse($_.split(/: /).first).iso9601
^^^^^^^^
Did you mean? iso8601
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