> For the complete documentation index, see [llms.txt](https://docs.mews.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mews.com/booking-engine-guide/changelog.md).

# Changelog

## 23rd March 2026

* API: Changed `OccupancyData` property from required to optional in [Get availability](/booking-engine-guide/booking-engine-api/operations/hotels.md#get-availability) request object. Documentation-only, no change to the API.

| Changelog by year                                                  |
| ------------------------------------------------------------------ |
| [Changelog 2025](/booking-engine-guide/changelog/changelog2025.md) |
| [Changelog 2024](/booking-engine-guide/changelog/changelog2024.md) |
| [Changelog 2023](/booking-engine-guide/changelog/changelog2023.md) |
| [Changelog 2022](/booking-engine-guide/changelog/changelog2022.md) |
| [Changelog 2021](/booking-engine-guide/changelog/changelog2021.md) |
| [Changelog 2020](/booking-engine-guide/changelog/changelog2020.md) |


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