raise ArgumentError, "invalid date" if str. UTC Coordinated Universal Time is the common time standard across the world. # 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` # Future `date` releases are expected to revert back to the original behavior. # File activesupport/lib/active_support/values/time_zone.rb, line 389 def iso8601( str) Keys are Rails TimeZone names, values are TZInfo identifiers. "Port Moresby" => "Pacific/Port_Moresby", Other parts of Australia stay in Standard time year around. South Australia, New South Wales and Victoria follow dayligth saving time during summer time. "West Central Africa" => "Africa/Algiers", Below is a time zone map of Australia with cities and with real live clock. "Cape Verde Is." => "Atlantic/Cape_Verde", "Mid-Atlantic" => "Atlantic/South_Georgia", "Buenos Aires" => "America/Argentina/Buenos_Aires", "Atlantic Time (Canada)" => "America/Halifax", "Indiana (East)" => "America/Indiana/Indianapolis", "Eastern Time (US & Canada)" => "America/New_York", Eleven standard time zones are indicated by different colors on the Asia time zone map. "Central America" => "America/Guatemala", The Asia Time Zone Map shows the time zone divisions observed on the Asian continent including outlying islands. "Central Time (US & Canada)" => "America/Chicago", "Mountain Time (US & Canada)" => "America/Denver", "Pacific Time (US & Canada)" => "America/Los_Angeles", "International Date Line West" => "Etc/GMT+12", Australia, a clickable map with current time in each time zone WA 4:41 PM QLD 6:41 PM NSW 7:41 PM VIC 7:41 PM NT 6:11 PM SA 7:11 PM TAS 7:41 PM Australias time zones.