def in_time_zone(zone = ::Time.zone)
      time_zone = ::Time.find_zone! zone
      time = acts_like?(:time) ? self : nil

      if time_zone
        time_with_zone(time, time_zone)
      else
        time || to_time
      end
    end
def in_time_zone(zone = ::Time.zone)
      time_zone = ::Time.find_zone! zone
      time = acts_like?(:time) ? self : nil

      if time_zone
        time_with_zone(time, time_zone)
      else
        time || to_time
      end
    end
Returns the simultaneous time in <tt>Time.zone</tt> if a zone is given or
 if Time.zone_default is set. Otherwise, it returns the current time.

   Time.zone = 'Hawaii'        # => 'Hawaii'
   Time.utc(2000).in_time_zone # => Fri, 31 Dec 1999 14:00:00 HST -10:00
   Date.new(2000).in_time_zone # => Sat, 01 Jan 2000 00:00:00 HST -10:00

 This method is similar to Time#localtime, except that it uses <tt>Time.zone</tt> as the local zone
 instead of the operating system's time zone.

 You can also pass in a TimeZone instance or string that identifies a TimeZone as an argument,
 and the conversion will be based on that zone instead of <tt>Time.zone</tt>.

   Time.utc(2000).in_time_zone('Alaska') # => Fri, 31 Dec 1999 15:00:00 AKST -09:00
   Date.new(2000).in_time_zone('Alaska') # => Sat, 01 Jan 2000 00:00:00 AKST -09:00