> For the complete documentation index, see [llms.txt](https://developers.cryptopay.me/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers.cryptopay.me/guides/api-basics/date-formats.md).

# Date formats

All timestamps are formatted using ISO 8601 format (RFC 3339). For those API calls that require a timestamp to be specified, it is necessary to use date and time in this format.

Example:

```
1994-11-15T08:12:31+00:00
```