Missing timezone_id field in Create absence period v2 endpoint

The fields starts_from and ends_at in Create absence period (v2) feature date_time fields, which should base on the timezone indicated by timezone_id field. This field doesn't seem to be available regarding the API reference of the endpoint (https://developer.personio.de/v2.0/reference/post_v2-absence-periods). The same applies for the Create attendance period endpoint. This one doesn't talk about it at all, though.

Should the API references be updated and the timezone_id can be actually provided?