IATA time zone is a
country or a part of a country, where
local time is the same. IATA time zone code is constructed of 2–4 characters (letters and digits) as follows: •
ISO 3166-1 alpha-2 country code is always used as first and second characters of time zone code. • If country is not divided into separate time zones – no more characters added. Just 2 characters used. • If country is divided into time zones – 3rd character of time zone code is a digit – number of time zone in country.
Note: Russia is divided into 11 time zones, so number of time zone in country is specified by 2 digits – RU01, RU02, ... RU11. • If some territories have the same local time, but different rules on
daylight saving time – a letter can be added as 4th character to make unique codes for all such territories.
Example: Time zone code AU2 is used for
Australian states
New South Wales and
Victoria (local time is
UTC + 10 hours, DST begins at end of October). Time zone code AU2A is used for
Tasmania (local time is UTC + 10 hours, DST begins at end of September). Time zone code AU2B is used for
Queensland (local time is UTC + 10 hours, no DST). == IATA region codes ==