edge badge

The TimeZone class serves as a wrapper around TZInfo::Timezone instances. It allows us to do the following:

  • Limit the set of zones provided by TZInfo to a meaningful subset of 134 zones.

  • Retrieve and display zones with a friendlier name (e.g., “Eastern Time (US & Canada)” instead of “America/New_York”).

  • Lazily load TZInfo::Timezone instances only when they're needed.

  • Create ActiveSupport::TimeWithZone instances via TimeZone's local, parse, at and now methods.

If you set config.time_zone in the Rails Application, you can access this TimeZone object via Time.zone:

# application.rb:
class Application < Rails::Application
  config.time_zone = 'Eastern Time (US & Canada)'
end

Time.zone      # => #<ActiveSupport::TimeZone:0x514834...>
Time.zone.name # => "Eastern Time (US & Canada)"
Time.zone.now  # => Sun, 18 May 2008 14:30:44 EDT -04:00
Methods
#
A
C
F
I
L
N
P
R
S
T
U
Y
Included Modules
Constants
MAPPING = { "International Date Line West" => "Etc/GMT+12", "Midway Island" => "Pacific/Midway", "American Samoa" => "Pacific/Pago_Pago", "Hawaii" => "Pacific/Honolulu", "Alaska" => "America/Juneau", "Pacific Time (US & Canada)" => "America/Los_Angeles", "Tijuana" => "America/Tijuana", "Mountain Time (US & Canada)" => "America/Denver", "Arizona" => "America/Phoenix", "Chihuahua" => "America/Chihuahua", "Mazatlan" => "America/Mazatlan", "Central Time (US & Canada)" => "America/Chicago", "Saskatchewan" => "America/Regina", "Guadalajara" => "America/Mexico_City", "Mexico City" => "America/Mexico_City", "Monterrey" => "America/Monterrey", "Central America" => "America/Guatemala", "Eastern Time (US & Canada)" => "America/New_York", "Indiana (East)" => "America/Indiana/Indianapolis", "Bogota" => "America/Bogota", "Lima" => "America/Lima", "Quito" => "America/Lima", "Atlantic Time (Canada)" => "America/Halifax", "Caracas" => "America/Caracas", "La Paz" => "America/La_Paz", "Santiago" => "America/Santiago", "Newfoundland" => "America/St_Johns", "Brasilia" => "America/Sao_Paulo", "Buenos Aires" => "America/Argentina/Buenos_Aires", "Montevideo" => "America/Montevideo", "Georgetown" => "America/Guyana", "Puerto Rico" => "America/Puerto_Rico", "Greenland" => "America/Godthab", "Mid-Atlantic" => "Atlantic/South_Georgia", "Azores" => "Atlantic/Azores", "Cape Verde Is." => "Atlantic/Cape_Verde", "Dublin" => "Europe/Dublin", "Edinburgh" => "Europe/London", "Lisbon" => "Europe/Lisbon", "London" => "Europe/London", "Casablanca" => "Africa/Casablanca", "Monrovia" => "Africa/Monrovia", "UTC" => "Etc/UTC", "Belgrade" => "Europe/Belgrade", "Bratislava" => "Europe/Bratislava", "Budapest" => "Europe/Budapest", "Ljubljana" => "Europe/Ljubljana", "Prague" => "Europe/Prague", "Sarajevo" => "Europe/Sarajevo", "Skopje" => "Europe/Skopje", "Warsaw" => "Europe/Warsaw", "Zagreb" => "Europe/Zagreb", "Brussels" => "Europe/Brussels", "Copenhagen" => "Europe/Copenhagen", "Madrid" => "Europe/Madrid", "Paris" => "Europe/Paris", "Amsterdam" => "Europe/Amsterdam", "Berlin" => "Europe/Berlin", "Bern" => "Europe/Zurich", "Zurich" => "Europe/Zurich", "Rome" => "Europe/Rome", "Stockholm" => "Europe/Stockholm", "Vienna" => "Europe/Vienna", "West Central Africa" => "Africa/Algiers", "Bucharest" => "Europe/Bucharest", "Cairo" => "Africa/Cairo", "Helsinki" => "Europe/Helsinki", "Kyiv" => "Europe/Kiev", "Riga" => "Europe/Riga", "Sofia" => "Europe/Sofia", "Tallinn" => "Europe/Tallinn", "Vilnius" => "Europe/Vilnius", "Athens" => "Europe/Athens", "Istanbul" => "Europe/Istanbul", "Minsk" => "Europe/Minsk", "Jerusalem" => "Asia/Jerusalem", "Harare" => "Africa/Harare", "Pretoria" => "Africa/Johannesburg", "Kaliningrad" => "Europe/Kaliningrad", "Moscow" => "Europe/Moscow", "St. Petersburg" => "Europe/Moscow", "Volgograd" => "Europe/Volgograd", "Samara" => "Europe/Samara", "Kuwait" => "Asia/Kuwait", "Riyadh" => "Asia/Riyadh", "Nairobi" => "Africa/Nairobi", "Baghdad" => "Asia/Baghdad", "Tehran" => "Asia/Tehran", "Abu Dhabi" => "Asia/Muscat", "Muscat" => "Asia/Muscat", "Baku" => "Asia/Baku", "Tbilisi" => "Asia/Tbilisi", "Yerevan" => "Asia/Yerevan", "Kabul" => "Asia/Kabul", "Ekaterinburg" => "Asia/Yekaterinburg", "Islamabad" => "Asia/Karachi", "Karachi" => "Asia/Karachi", "Tashkent" => "Asia/Tashkent", "Chennai" => "Asia/Kolkata", "Kolkata" => "Asia/Kolkata", "Mumbai" => "Asia/Kolkata", "New Delhi" => "Asia/Kolkata", "Kathmandu" => "Asia/Kathmandu", "Astana" => "Asia/Dhaka", "Dhaka" => "Asia/Dhaka", "Sri Jayawardenepura" => "Asia/Colombo", "Almaty" => "Asia/Almaty", "Novosibirsk" => "Asia/Novosibirsk", "Rangoon" => "Asia/Rangoon", "Bangkok" => "Asia/Bangkok", "Hanoi" => "Asia/Bangkok", "Jakarta" => "Asia/Jakarta", "Krasnoyarsk" => "Asia/Krasnoyarsk", "Beijing" => "Asia/Shanghai", "Chongqing" => "Asia/Chongqing", "Hong Kong" => "Asia/Hong_Kong", "Urumqi" => "Asia/Urumqi", "Kuala Lumpur" => "Asia/Kuala_Lumpur", "Singapore" => "Asia/Singapore", "Taipei" => "Asia/Taipei", "Perth" => "Australia/Perth", "Irkutsk" => "Asia/Irkutsk", "Ulaanbaatar" => "Asia/Ulaanbaatar", "Seoul" => "Asia/Seoul", "Osaka" => "Asia/Tokyo", "Sapporo" => "Asia/Tokyo", "Tokyo" => "Asia/Tokyo", "Yakutsk" => "Asia/Yakutsk", "Darwin" => "Australia/Darwin", "Adelaide" => "Australia/Adelaide", "Canberra" => "Australia/Melbourne", "Melbourne" => "Australia/Melbourne", "Sydney" => "Australia/Sydney", "Brisbane" => "Australia/Brisbane", "Hobart" => "Australia/Hobart", "Vladivostok" => "Asia/Vladivostok", "Guam" => "Pacific/Guam", "Port Moresby" => "Pacific/Port_Moresby", "Magadan" => "Asia/Magadan", "Srednekolymsk" => "Asia/Srednekolymsk", "Solomon Is." => "Pacific/Guadalcanal", "New Caledonia" => "Pacific/Noumea", "Fiji" => "Pacific/Fiji", "Kamchatka" => "Asia/Kamchatka", "Marshall Is." => "Pacific/Majuro", "Auckland" => "Pacific/Auckland", "Wellington" => "Pacific/Auckland", "Nuku'alofa" => "Pacific/Tongatapu", "Tokelau Is." => "Pacific/Fakaofo", "Chatham Is." => "Pacific/Chatham", "Samoa" => "Pacific/Apia" }
 

Keys are Rails TimeZone names, values are TZInfo identifiers.

UTC_OFFSET_WITHOUT_COLON = UTC_OFFSET_WITH_COLON.tr(":", "")
 
UTC_OFFSET_WITH_COLON = "%s%02d:%02d"
 
Attributes
[R] name
[R] tzinfo
Class Public methods
[](arg)

Locate a specific time zone object. If the argument is a string, it is interpreted to mean the name of the timezone to locate. If it is a numeric value it is either the hour offset, or the second offset, of the timezone to find. (The first one with that offset will be returned.) Returns nil if no such time zone is known to the system.

# File activesupport/lib/active_support/values/time_zone.rb, line 229
def [](arg)
  case arg
  when String
    begin
      @lazy_zones_map[arg] ||= create(arg)
    rescue TZInfo::InvalidTimezoneIdentifier
      nil
    end
  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
all()

Returns an array of all TimeZone objects. There are multiple TimeZone objects per time zone, in many cases, to make it easier for users to find their own time zone.

# File activesupport/lib/active_support/values/time_zone.rb, line 220
def all
  @zones ||= zones_map.values.sort
end
country_zones(country_code)

A convenience method for returning a collection of TimeZone objects for time zones in the country specified by its ISO 3166-1 Alpha2 code.

# File activesupport/lib/active_support/values/time_zone.rb, line 253
def country_zones(country_code)
  code = country_code.to_s.upcase
  @country_zones[code] ||= load_country_zones(code)
end
create(name)
Alias for: new
find_tzinfo(name)
# File activesupport/lib/active_support/values/time_zone.rb, line 204
def find_tzinfo(name)
  TZInfo::Timezone.new(MAPPING[name] || name)
end
new(name)

Returns a TimeZone instance with the given name, or nil if no such TimeZone instance exists. (This exists to support the use of this class with the composed_of macro.)

Also aliased as: create
# File activesupport/lib/active_support/values/time_zone.rb, line 213
def new(name)
  self[name]
end
new(name, utc_offset = nil, tzinfo = nil)

Create a new TimeZone object with the given name and offset. The offset is the number of seconds that this time zone is offset from UTC (GMT). Seconds were chosen as the offset unit because that is the unit that Ruby uses to represent time zone offsets (see Time#utc_offset).

# File activesupport/lib/active_support/values/time_zone.rb, line 296
def initialize(name, utc_offset = nil, tzinfo = nil)
  @name = name
  @utc_offset = utc_offset
  @tzinfo = tzinfo || TimeZone.find_tzinfo(name)
end
seconds_to_utc_offset(seconds, colon = true)

Assumes self represents an offset from UTC in seconds (as returned from Time#utc_offset) and turns this into an +HH:MM formatted string.

ActiveSupport::TimeZone.seconds_to_utc_offset(-21_600) # => "-06:00"
# File activesupport/lib/active_support/values/time_zone.rb, line 196
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
us_zones()

A convenience method for returning a collection of TimeZone objects for time zones in the USA.

# File activesupport/lib/active_support/values/time_zone.rb, line 247
def us_zones
  country_zones(:us)
end
Instance Public methods
<=>(zone)

Compare this time zone to the parameter. The two are compared first on their offsets, and then by name.

# File activesupport/lib/active_support/values/time_zone.rb, line 323
    def <=>(zone)
      return unless zone.respond_to? :utc_offset
      result = (utc_offset <=> zone.utc_offset)
      result = (name <=> zone.name) if result == 0
      result
    end

    # Compare #name and TZInfo identifier to a supplied regexp, returning +true+
    # if a match is found.
    def =~(re)
      re === name || re === MAPPING[name]
    end

    # Returns a textual representation of this time zone.
    def to_s
      "(GMT#{formatted_offset}) #{name}"
    end

    # Method for creating new ActiveSupport::TimeWithZone instance in time zone
    # of +self+ from given values.
    #
    #   Time.zone = 'Hawaii'                    # => "Hawaii"
    #   Time.zone.local(2007, 2, 1, 15, 30, 45) # => Thu, 01 Feb 2007 15:30:45 HST -10:00
    def local(*args)
      time = Time.utc(*args)
      ActiveSupport::TimeWithZone.new(nil, self, time)
    end

    # Method for creating new ActiveSupport::TimeWithZone instance in time zone
    # of +self+ from number of seconds since the Unix epoch.
    #
    #   Time.zone = 'Hawaii'        # => "Hawaii"
    #   Time.utc(2000).to_f         # => 946684800.0
    #   Time.zone.at(946684800.0)   # => Fri, 31 Dec 1999 14:00:00 HST -10:00
    #
    # A second argument can be supplied to specify sub-second precision.
    #
    #   Time.zone = 'Hawaii'                # => "Hawaii"
    #   Time.at(946684800, 123456.789).nsec # => 123456789
    def at(*args)
      Time.at(*args).utc.in_time_zone(self)
    end

    # Method for creating new ActiveSupport::TimeWithZone instance in time zone
    # of +self+ from an ISO 8601 string.
    #
    #   Time.zone = 'Hawaii'                     # => "Hawaii"
    #   Time.zone.iso8601('1999-12-31T14:00:00') # => Fri, 31 Dec 1999 14:00:00 HST -10:00
    #
    # If the time components are missing then they will be set to zero.
    #
    #   Time.zone = 'Hawaii'            # => "Hawaii"
    #   Time.zone.iso8601('1999-12-31') # => Fri, 31 Dec 1999 00:00:00 HST -10:00
    #
    # If the string is invalid then an +ArgumentError+ will be raised unlike +parse+
    # which usually returns +nil+ when given an invalid date string.
    def iso8601(str)
      parts = Date._iso8601(str)

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

      time = Time.new(
        parts.fetch(:year),
        parts.fetch(:mon),
        parts.fetch(:mday),
        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
    end

    # Method for creating new ActiveSupport::TimeWithZone instance in time zone
    # of +self+ from parsed string.
    #
    #   Time.zone = 'Hawaii'                   # => "Hawaii"
    #   Time.zone.parse('1999-12-31 14:00:00') # => Fri, 31 Dec 1999 14:00:00 HST -10:00
    #
    # If upper components are missing from the string, they are supplied from
    # TimeZone#now:
    #
    #   Time.zone.now               # => Fri, 31 Dec 1999 14:00:00 HST -10:00
    #   Time.zone.parse('22:30:00') # => Fri, 31 Dec 1999 22:30:00 HST -10:00
    #
    # However, if the date component is not provided, but any other upper
    # components are supplied, then the day of the month defaults to 1:
    #
    #   Time.zone.parse('Mar 2000') # => Wed, 01 Mar 2000 00:00:00 HST -10:00
    #
    # If the string is invalid then an +ArgumentError+ could be raised.
    def parse(str, now = now())
      parts_to_time(Date._parse(str, false), now)
    end

    # Method for creating new ActiveSupport::TimeWithZone instance in time zone
    # of +self+ from an RFC 3339 string.
    #
    #   Time.zone = 'Hawaii'                     # => "Hawaii"
    #   Time.zone.rfc3339('2000-01-01T00:00:00Z') # => Fri, 31 Dec 1999 14:00:00 HST -10:00
    #
    # If the time or zone components are missing then an +ArgumentError+ will
    # be raised. This is much stricter than either +parse+ or +iso8601+ which
    # allow for missing components.
    #
    #   Time.zone = 'Hawaii'            # => "Hawaii"
    #   Time.zone.rfc3339('1999-12-31') # => ArgumentError: invalid date
    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

    # Parses +str+ according to +format+ and returns an ActiveSupport::TimeWithZone.
    #
    # Assumes that +str+ is a time in the time zone +self+,
    # unless +format+ includes an explicit time zone.
    # (This is the same behavior as +parse+.)
    # In either case, the returned TimeWithZone has the timezone of +self+.
    #
    #   Time.zone = 'Hawaii'                   # => "Hawaii"
    #   Time.zone.strptime('1999-12-31 14:00:00', '%Y-%m-%d %H:%M:%S') # => Fri, 31 Dec 1999 14:00:00 HST -10:00
    #
    # If upper components are missing from the string, they are supplied from
    # TimeZone#now:
    #
    #   Time.zone.now                              # => Fri, 31 Dec 1999 14:00:00 HST -10:00
    #   Time.zone.strptime('22:30:00', '%H:%M:%S') # => Fri, 31 Dec 1999 22:30:00 HST -10:00
    #
    # However, if the date component is not provided, but any other upper
    # components are supplied, then the day of the month defaults to 1:
    #
    #   Time.zone.strptime('Mar 2000', '%b %Y') # => Wed, 01 Mar 2000 00:00:00 HST -10:00
    def strptime(str, format, now = now())
      parts_to_time(DateTime._strptime(str, format), now)
    end

    # Returns an ActiveSupport::TimeWithZone instance representing the current
    # time in the time zone represented by +self+.
    #
    #   Time.zone = 'Hawaii'  # => "Hawaii"
    #   Time.zone.now         # => Wed, 23 Jan 2008 20:24:27 HST -10:00
    def now
      time_now.utc.in_time_zone(self)
    end

    # Returns the current date in this time zone.
    def today
      tzinfo.now.to_date
    end

    # Returns the next date in this time zone.
    def tomorrow
      today + 1
    end

    # Returns the previous date in this time zone.
    def yesterday
      today - 1
    end

    # Adjust the given time to the simultaneous time in the time zone
    # represented by +self+. Returns a Time.utc() instance -- if you want an
    # ActiveSupport::TimeWithZone instance, use Time#in_time_zone() instead.
    def utc_to_local(time)
      tzinfo.utc_to_local(time)
    end

    # Adjust the given time to the simultaneous time in UTC. Returns a
    # Time.utc() instance.
    def local_to_utc(time, dst = true)
      tzinfo.local_to_utc(time, dst)
    end

    # Available so that TimeZone instances respond like TZInfo::Timezone
    # instances.
    def period_for_utc(time)
      tzinfo.period_for_utc(time)
    end

    # Available so that TimeZone instances respond like TZInfo::Timezone
    # instances.
    def period_for_local(time, dst = true)
      tzinfo.period_for_local(time, dst) { |periods| periods.last }
    end

    def periods_for_local(time) #:nodoc:
      tzinfo.periods_for_local(time)
    end

    def init_with(coder) #:nodoc:
      initialize(coder["name"])
    end

    def encode_with(coder) #:nodoc:
      coder.tag = "!ruby/object:#{self.class}"
      coder.map = { "name" => tzinfo.name }
    end

    private
      def parts_to_time(parts, now)
        raise ArgumentError, "invalid date" if parts.nil?
        return if parts.empty?

        if parts[:seconds]
          time = Time.at(parts[:seconds])
        else
          time = Time.new(
            parts.fetch(:year, now.year),
            parts.fetch(:mon, now.month),
            parts.fetch(:mday, parts[:year] || parts[:mon] ? 1 : now.day),
            parts.fetch(:hour, 0),
            parts.fetch(:min, 0),
            parts.fetch(:sec, 0) + parts.fetch(:sec_fraction, 0),
            parts.fetch(:offset, 0)
          )
        end

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

      def time_now
        Time.now
      end
  end
end
=~(re)

Compare name and TZInfo identifier to a supplied regexp, returning true if a match is found.

# File activesupport/lib/active_support/values/time_zone.rb, line 332
def =~(re)
  re === name || re === MAPPING[name]
end
at(*args)

Method for creating new ActiveSupport::TimeWithZone instance in time zone of self from number of seconds since the Unix epoch.

Time.zone = 'Hawaii'        # => "Hawaii"
Time.utc(2000).to_f         # => 946684800.0
Time.zone.at(946684800.0)   # => Fri, 31 Dec 1999 14:00:00 HST -10:00

A second argument can be supplied to specify sub-second precision.

Time.zone = 'Hawaii'                # => "Hawaii"
Time.at(946684800, 123456.789).nsec # => 123456789
# File activesupport/lib/active_support/values/time_zone.rb, line 362
def at(*args)
  Time.at(*args).utc.in_time_zone(self)
end
formatted_offset(colon = true, alternate_utc_string = nil)

Returns a formatted string of the offset from UTC, or an alternative string if the time zone is already UTC.

zone = ActiveSupport::TimeZone['Central Time (US & Canada)']
zone.formatted_offset        # => "-06:00"
zone.formatted_offset(false) # => "-0600"
# File activesupport/lib/active_support/values/time_zone.rb, line 317
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
iso8601(str)

Method for creating new ActiveSupport::TimeWithZone instance in time zone of self from an ISO 8601 string.

Time.zone = 'Hawaii'                     # => "Hawaii"
Time.zone.iso8601('1999-12-31T14:00:00') # => Fri, 31 Dec 1999 14:00:00 HST -10:00

If the time components are missing then they will be set to zero.

Time.zone = 'Hawaii'            # => "Hawaii"
Time.zone.iso8601('1999-12-31') # => Fri, 31 Dec 1999 00:00:00 HST -10:00

If the string is invalid then an ArgumentError will be raised unlike parse which usually returns nil when given an invalid date string.

# File activesupport/lib/active_support/values/time_zone.rb, line 379
def iso8601(str)
  parts = Date._iso8601(str)

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

  time = Time.new(
    parts.fetch(:year),
    parts.fetch(:mon),
    parts.fetch(:mday),
    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
end
local(*args)

Method for creating new ActiveSupport::TimeWithZone instance in time zone of self from given values.

Time.zone = 'Hawaii'                    # => "Hawaii"
Time.zone.local(2007, 2, 1, 15, 30, 45) # => Thu, 01 Feb 2007 15:30:45 HST -10:00
# File activesupport/lib/active_support/values/time_zone.rb, line 346
def local(*args)
  time = Time.utc(*args)
  ActiveSupport::TimeWithZone.new(nil, self, time)
end
local_to_utc(time, dst = true)

Adjust the given time to the simultaneous time in UTC. Returns a Time.utc() instance.

# File activesupport/lib/active_support/values/time_zone.rb, line 510
def local_to_utc(time, dst = true)
  tzinfo.local_to_utc(time, dst)
end
now()

Returns an ActiveSupport::TimeWithZone instance representing the current time in the time zone represented by self.

Time.zone = 'Hawaii'  # => "Hawaii"
Time.zone.now         # => Wed, 23 Jan 2008 20:24:27 HST -10:00
# File activesupport/lib/active_support/values/time_zone.rb, line 482
def now
  time_now.utc.in_time_zone(self)
end
parse(str, now = now())

Method for creating new ActiveSupport::TimeWithZone instance in time zone of self from parsed string.

Time.zone = 'Hawaii'                   # => "Hawaii"
Time.zone.parse('1999-12-31 14:00:00') # => Fri, 31 Dec 1999 14:00:00 HST -10:00

If upper components are missing from the string, they are supplied from #now:

Time.zone.now               # => Fri, 31 Dec 1999 14:00:00 HST -10:00
Time.zone.parse('22:30:00') # => Fri, 31 Dec 1999 22:30:00 HST -10:00

However, if the date component is not provided, but any other upper components are supplied, then the day of the month defaults to 1:

Time.zone.parse('Mar 2000') # => Wed, 01 Mar 2000 00:00:00 HST -10:00

If the string is invalid then an ArgumentError could be raised.

# File activesupport/lib/active_support/values/time_zone.rb, line 419
def parse(str, now = now())
  parts_to_time(Date._parse(str, false), now)
end
parts_to_time(parts, now)
# File activesupport/lib/active_support/values/time_zone.rb, line 540
    def parts_to_time(parts, now)
      raise ArgumentError, "invalid date" if parts.nil?
      return if parts.empty?

      if parts[:seconds]
        time = Time.at(parts[:seconds])
      else
        time = Time.new(
          parts.fetch(:year, now.year),
          parts.fetch(:mon, now.month),
          parts.fetch(:mday, parts[:year] || parts[:mon] ? 1 : now.day),
          parts.fetch(:hour, 0),
          parts.fetch(:min, 0),
          parts.fetch(:sec, 0) + parts.fetch(:sec_fraction, 0),
          parts.fetch(:offset, 0)
        )
      end

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

    def time_now
      Time.now
    end
end
period_for_local(time, dst = true)

Available so that TimeZone instances respond like TZInfo::Timezone instances.

# File activesupport/lib/active_support/values/time_zone.rb, line 522
def period_for_local(time, dst = true)
  tzinfo.period_for_local(time, dst) { |periods| periods.last }
end
period_for_utc(time)

Available so that TimeZone instances respond like TZInfo::Timezone instances.

# File activesupport/lib/active_support/values/time_zone.rb, line 516
def period_for_utc(time)
  tzinfo.period_for_utc(time)
end
rfc3339(str)

Method for creating new ActiveSupport::TimeWithZone instance in time zone of self from an RFC 3339 string.

Time.zone = 'Hawaii'                     # => "Hawaii"
Time.zone.rfc3339('2000-01-01T00:00:00Z') # => Fri, 31 Dec 1999 14:00:00 HST -10:00

If the time or zone components are missing then an ArgumentError will be raised. This is much stricter than either parse or iso8601 which allow for missing components.

Time.zone = 'Hawaii'            # => "Hawaii"
Time.zone.rfc3339('1999-12-31') # => ArgumentError: invalid date
# File activesupport/lib/active_support/values/time_zone.rb, line 435
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
strptime(str, format, now = now())

Parses str according to format and returns an ActiveSupport::TimeWithZone.

Assumes that str is a time in the time zone self, unless format includes an explicit time zone. (This is the same behavior as parse.) In either case, the returned TimeWithZone has the timezone of self.

Time.zone = 'Hawaii'                   # => "Hawaii"
Time.zone.strptime('1999-12-31 14:00:00', '%Y-%m-%d %H:%M:%S') # => Fri, 31 Dec 1999 14:00:00 HST -10:00

If upper components are missing from the string, they are supplied from #now:

Time.zone.now                              # => Fri, 31 Dec 1999 14:00:00 HST -10:00
Time.zone.strptime('22:30:00', '%H:%M:%S') # => Fri, 31 Dec 1999 22:30:00 HST -10:00

However, if the date component is not provided, but any other upper components are supplied, then the day of the month defaults to 1:

Time.zone.strptime('Mar 2000', '%b %Y') # => Wed, 01 Mar 2000 00:00:00 HST -10:00
# File activesupport/lib/active_support/values/time_zone.rb, line 473
def strptime(str, format, now = now())
  parts_to_time(DateTime._strptime(str, format), now)
end
time_now()
# File activesupport/lib/active_support/values/time_zone.rb, line 565
def time_now
  Time.now
end
to_s()

Returns a textual representation of this time zone.

# File activesupport/lib/active_support/values/time_zone.rb, line 337
def to_s
  "(GMT#{formatted_offset}) #{name}"
end
today()

Returns the current date in this time zone.

# File activesupport/lib/active_support/values/time_zone.rb, line 487
def today
  tzinfo.now.to_date
end
tomorrow()

Returns the next date in this time zone.

# File activesupport/lib/active_support/values/time_zone.rb, line 492
def tomorrow
  today + 1
end
utc_offset()

Returns the offset of this time zone from UTC in seconds.

# File activesupport/lib/active_support/values/time_zone.rb, line 303
def utc_offset
  if @utc_offset
    @utc_offset
  else
    tzinfo.current_period.utc_offset if tzinfo && tzinfo.current_period
  end
end
utc_to_local(time)

Adjust the given time to the simultaneous time in the time zone represented by self. Returns a Time.utc() instance – if you want an ActiveSupport::TimeWithZone instance, use DateAndTime::Zones#in_time_zone instead.

# File activesupport/lib/active_support/values/time_zone.rb, line 504
def utc_to_local(time)
  tzinfo.utc_to_local(time)
end
yesterday()

Returns the previous date in this time zone.

# File activesupport/lib/active_support/values/time_zone.rb, line 497
def yesterday
  today - 1
end