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# Standardisation

## Dates

\Dates and timestamps are encoded as strings using ISO 8601, for example `2023-10-12T06:47:00Z`. You can also include a timezone offset, such as `+02:00` for Amsterdam. Milliseconds are not accepted, so a value like `2023-10-09T06:54:45.157Z` will be rejected.

## Time zones

Time zones represent the geographical location of the legal entity. The following identifier formats are accepted:

| Convention             | Example                                                                                                                                              |
| ---------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------- |
| Time zone name         | `Area/Location` (for example, `India/New_Delhi` or `Europe/London`). The Area is a continent or country and the Location is a city within that Area. |
| GMT/UTC offset         | `GMT+offset` or `UTC+offset` (for example, `GMT+1` for Central European Time).                                                                       |
| Time zone abbreviation | Any standard abbreviation (for example, `IST` for Irish Standard Time or `D` for Delta Time Zone).                                                   |

## Country codes

Country codes follow the ISO 3166-1 alpha-2 standard. Examples include `GB` for the United Kingdom of Great Britain and Northern Ireland and `US` for the United States of America.