From: "nobu (Nobuyoshi Nakada)" Date: 2013-05-08T13:12:30+09:00 Subject: [ruby-core:54861] [ruby-trunk - Bug #8376] utc method changes original time object Issue #8376 has been updated by nobu (Nobuyoshi Nakada). You can use Time#getutc or #getgm. ---------------------------------------- Bug #8376: utc method changes original time object https://bugs.ruby-lang.org/issues/8376#change-39190 Author: arjan0307 (Arjan Diepenbroek) Status: Rejected Priority: Normal Assignee: Category: Target version: ruby -v: 1.8.7, 1.9.3, 2.0.0 Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN The utc method changes the original time object when called. For example when on a system with a CET timezone. t = Time.new(2013) t.zone # CET t.utc t.zone # UTC -- http://bugs.ruby-lang.org/