Working with ActiveSupport::TimeZone

dst.js

// MomentJS can use different types of timezone offset 
// including the one obtained by ActiveSupport::TimeZone

var timezone_offset = "+01:00";

console.log(moment().zone(timezone_offset).format('LLLL'));
> Tuesday, October 28 2014 7:51 PM

console.log(moment().format('LLLL'));
> Tuesday, October 28 2014 11:51 AM 

dst.rb

# Good to know for the future when
# dealing with daylight saving time

timezone = 'Rome'

$ ActiveSupport::TimeZone[timezone].now.formatted_offset
> "+01:00"

$ ActiveSupport::TimeZone[timezone].formatted_offset
> "+01:00"

timezone = 'Pacific Time (US & Canada)'

$ ActiveSupport::TimeZone[timezone].now.formatted_offset
> "+07:00"

$ ActiveSupport::TimeZone[timezone].formatted_offset
> "+08:00"