# File activesupport/lib/active_support/values/time_zone.rb, line 234
      def [](arg)
        case arg
        when self
          arg
        when String
          begin
            @lazy_zones_map[arg] ||= create(arg)
          rescue TZInfo::InvalidTimezoneIdentifier
            nil
          end
        when TZInfo::Timezone
          @lazy_zones_map[arg.name] ||= create(arg.name, nil, arg)
        when Numeric, ActiveSupport::Duration
          arg *= 3600 if arg.abs <= 13
          all.find { |z| z.utc_offset == arg.to_i }
        else
          raise ArgumentError, "invalid argument to TimeZone[]: #{arg.inspect}"
        end
      end

# File activesupport/lib/active_support/values/time_zone.rb, line 225
      def all
        @zones ||= zones_map.values.sort
      end

# File activesupport/lib/active_support/values/time_zone.rb, line 262
      def country_zones(country_code)
        code = country_code.to_s.upcase
        @country_zones[code] ||= load_country_zones(code)
      end

# File activesupport/lib/active_support/values/time_zone.rb, line 207
      def find_tzinfo(name)
        TZInfo::Timezone.get(MAPPING[name] || name)
      end

# File activesupport/lib/active_support/values/time_zone.rb, line 218
      def new(name)
        self[name]
      end

# File activesupport/lib/active_support/values/time_zone.rb, line 199
      def seconds_to_utc_offset(seconds, colon = true)
        format = colon ? UTC_OFFSET_WITH_COLON : UTC_OFFSET_WITHOUT_COLON
        sign = (seconds < 0 ? "-" : "+")
        hours = seconds.abs / 3600
        minutes = (seconds.abs % 3600) / 60
        format % [sign, hours, minutes]
      end

# File activesupport/lib/active_support/values/time_zone.rb, line 256
      def us_zones
        country_zones(:us)
      end

# File activesupport/lib/active_support/values/time_zone.rb, line 335
    def <=>(zone)
      return unless zone.respond_to? :utc_offset
      result = (utc_offset <=> zone.utc_offset)
      result = (name <=> zone.name) if result == 0
      result
    end

# File activesupport/lib/active_support/values/time_zone.rb, line 344
    def =~(re)
      re === name || re === MAPPING[name]
    end

# File activesupport/lib/active_support/values/time_zone.rb, line 381
    def at(*args)
      Time.at(*args).utc.in_time_zone(self)
    end

# File activesupport/lib/active_support/values/time_zone.rb, line 329
    def formatted_offset(colon = true, alternate_utc_string = nil)
      utc_offset == 0 && alternate_utc_string || self.class.seconds_to_utc_offset(utc_offset, colon)
    end

# File activesupport/lib/active_support/values/time_zone.rb, line 398
    def iso8601(str)
      # Historically `Date._iso8601(nil)` returns `{}`, but in the `date` gem versions `3.2.1`, `3.1.2`, `3.0.2`,
      # and `2.0.1`, `Date._iso8601(nil)` raises `TypeError` https://github.com/ruby/date/issues/39
      # Future `date` releases are expected to revert back to the original behavior.
      raise ArgumentError, "invalid date" if str.nil?

      parts = Date._iso8601(str)

      year = parts.fetch(:year)

      if parts.key?(:yday)
        ordinal_date = Date.ordinal(year, parts.fetch(:yday))
        month = ordinal_date.month
        day = ordinal_date.day
      else
        month = parts.fetch(:mon)
        day = parts.fetch(:mday)
      end

      time = Time.new(
        year,
        month,
        day,
        parts.fetch(:hour, 0),
        parts.fetch(:min, 0),
        parts.fetch(:sec, 0) + parts.fetch(:sec_fraction, 0),
        parts.fetch(:offset, 0)
      )

      if parts[:offset]
        TimeWithZone.new(time.utc, self)
      else
        TimeWithZone.new(nil, self, time)
      end

    rescue Date::Error, KeyError
      raise ArgumentError, "invalid date"
    end

# File activesupport/lib/active_support/values/time_zone.rb, line 365
    def local(*args)
      time = Time.utc(*args)
      ActiveSupport::TimeWithZone.new(nil, self, time)
    end

# File activesupport/lib/active_support/values/time_zone.rb, line 553
    def local_to_utc(time, dst = true)
      tzinfo.local_to_utc(time, dst)
    end

# File activesupport/lib/active_support/values/time_zone.rb, line 350
    def match?(re)
      (re == name) || (re == MAPPING[name]) ||
        ((Regexp === re) && (re.match?(name) || re.match?(MAPPING[name])))
    end

# File activesupport/lib/active_support/values/time_zone.rb, line 518
    def now
      time_now.utc.in_time_zone(self)
    end

# File activesupport/lib/active_support/values/time_zone.rb, line 455
    def parse(str, now = now())
      parts_to_time(Date._parse(str, false), now)
    end

# File activesupport/lib/active_support/values/time_zone.rb, line 565
    def period_for_local(time, dst = true)
      tzinfo.period_for_local(time, dst) { |periods| periods.last }
    end

# File activesupport/lib/active_support/values/time_zone.rb, line 559
    def period_for_utc(time)
      tzinfo.period_for_utc(time)
    end

# File activesupport/lib/active_support/values/time_zone.rb, line 471
    def rfc3339(str)
      parts = Date._rfc3339(str)

      raise ArgumentError, "invalid date" if parts.empty?

      time = Time.new(
        parts.fetch(:year),
        parts.fetch(:mon),
        parts.fetch(:mday),
        parts.fetch(:hour),
        parts.fetch(:min),
        parts.fetch(:sec) + parts.fetch(:sec_fraction, 0),
        parts.fetch(:offset)
      )

      TimeWithZone.new(time.utc, self)
    end

# File activesupport/lib/active_support/values/time_zone.rb, line 509
    def strptime(str, format, now = now())
      parts_to_time(DateTime._strptime(str, format), now)
    end

# File activesupport/lib/active_support/values/time_zone.rb, line 356
    def to_s
      "(GMT#{formatted_offset}) #{name}"
    end

# File activesupport/lib/active_support/values/time_zone.rb, line 523
    def today
      tzinfo.now.to_date
    end

# File activesupport/lib/active_support/values/time_zone.rb, line 528
    def tomorrow
      today + 1
    end

# File activesupport/lib/active_support/values/time_zone.rb, line 319
    def utc_offset
      @utc_offset || tzinfo&.current_period&.base_utc_offset
    end

# File activesupport/lib/active_support/values/time_zone.rb, line 544
    def utc_to_local(time)
      tzinfo.utc_to_local(time).yield_self do |t|
        ActiveSupport.utc_to_local_returns_utc_offset_times ?
          t : Time.utc(t.year, t.month, t.day, t.hour, t.min, t.sec, t.sec_fraction * 1_000_000)
      end
    end

# File activesupport/lib/active_support/values/time_zone.rb, line 533
    def yesterday
      today - 1
    end