Issue #3035 has been updated by Jeremy Kemper. Ok. I found a good explanation in this thread: http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-core/22892 I think it would be more pragmatic to include the zone name and fall back to utc_offset. Lossy marshaling is surprising. ---------------------------------------- http://redmine.ruby-lang.org/issues/show/3035 ---------------------------------------- http://redmine.ruby-lang.org