zone_offset

# File lib/time.rb, line 69
    def zone_offset(zone, year=self.now.year)
      off = nil
      zone = zone.upcase
      if /\A([+-])(\d\d):?(\d\d)\z/ =~ zone
        off = ($1 == '-' ? -1 : 1) * ($2.to_i * 60 + $3.to_i) * 60
      elsif /\A[+-]\d\d\z/ =~ zone
        off = zone.to_i * 3600
      elsif ZoneOffset.include?(zone)
        off = ZoneOffset[zone] * 3600
      elsif ((t = self.local(year, 1, 1)).zone.upcase == zone rescue false)
        off = t.utc_offset
      elsif ((t = self.local(year, 7, 1)).zone.upcase == zone rescue false)
        off = t.utc_offset
      end
      off
    end