---
title: "Culture Handling"
url: "https://developer.tesma.com/getting-started/culture-handling"
image: "https://developer.tesma.com/_og/d/c_Ocean.takumi,title_Culture+Handling,props_eyJ0aGVtZSI6eyJtb2RlIjoibGlnaHQiLCJjb2xvcnMiOnsicHJpbWFyeSI6IiM0Mjg1ZjQifX19,p_Ii9nZXR0aW5nLXN0YXJ0ZWQvY3VsdHVyZS1oYW5kbGluZyI,s_hAac8ElKExTJgybm.png"
---

# Culture handling

Learn how to handle culture and localization settings in your API requests.

## [Date and time](#date-and-time)

All timestamps are returned in ISO 8601 format, meaning that a date is formatted as `2022-01-17`. Datetime values are formatted as `2022-01-17T15:23:11Z` and returned in UTC time.

## [Language](#language)

Some endpoints produce translated values, e.g the asset classes. To request a specific language, pass the `Accept-Language` header in the http request.

The following languages are available at the time of writing:

-   `en-GB` for british english
-   `de` for german
-   `fr` for french
-   `it` for italian
-   `es` for spanish
-   `nl` for dutch
-   `fi` for finnish
-   `sv` for swedish

If the `Accept-Language` header is not provided, the en-GB language will be set as default. The response will contain a `Content-Language` header if the language is not the default.