# References convention

Existing international conventions are references to be used for your strategies.

## International conventions

### Time

* [Representation of dates and times ISO 8601 ](https://en.wikipedia.org/wiki/ISO_8601)

### Localization

**Region**

* [International Civil Aviation Organization (ICAO) region](https://en.wikipedia.org/wiki/ICAO_airport_code)

**Country**

* [Country subdivision code](https://en.wikipedia.org/wiki/ISO_3166-2) (ISO 3166)
* [**United Nations Code for Trade and Transport Locations (**UN/LOCODE)](https://en.wikipedia.org/wiki/UN/LOCODE)
* [International Civil Aviation Organization (ICAO) ](https://en.wikipedia.org/wiki/ICAO_airport_code)country
* [Mobile Country Code](https://en.wikipedia.org/wiki/Mobile_country_code)

**City**

* [International Air Transport Association (IATA) airport code](https://en.wikipedia.org/wiki/IATA_airport_code)
* [International Civil Aviation Organization (ICAO) ](https://en.wikipedia.org/wiki/ICAO_airport_code)airport