> ## Documentation Index
> Fetch the complete documentation index at: https://docs.spaportal.cz/llms.txt
> Use this file to discover all available pages before exploring further.

# Dates

> Format dates in SpaPortal API requests and responses.

SpaPortal API date fields use ISO 8601 calendar dates in `YYYY-MM-DD` format.

Examples:

```txt theme={null}
2026-04-01
2026-04-21
```

Date fields do not include a time or time zone.

Where an endpoint takes a date range, `dateFrom` is the start of the range and
`dateTo` is the end.