Issue #6491 has been updated by tadf (tadayoshi funaba). Time's one also says. but, actually it depends on platform. on windows, may not always return abbreviation. this may be a matter of common sense. but, it's not so good for novice. ---------------------------------------- Bug #6491: DateTime.strftime('%Z') output is incorrect format https://bugs.ruby-lang.org/issues/6491#change-26836 Author: zombor (Jeremy Bush) Status: Rejected Priority: Low Assignee: tadf (tadayoshi funaba) Category: Target version: ruby -v: ruby 1.9.3p125 (2012-02-16 revision 34643) [x86_64-darwin11] DateTime.parse('2012/05/23').strftime('%Z') should output 'GMT' (or a similar string). It outputs "+00:00" (or a similar offset string). -- http://bugs.ruby-lang.org/