Timezone in watchers

I attempted to configure a Watcher schedule using the timezone property as shown below:

"schedule": {
"timezone": "Pacific/Auckland",
"daily": {
"at": "12:00"
}
}

However, when saving the Watcher, I encountered the following error:

Could not parse schedule for [653ba143-c8b4-452e-9080-07c89e63e9f3]. Unknown schedule type [timezone]

The Elasticsearch version currently in use is 8.17.3.

Any insights on why this might be occurring or suggestions for resolving this issue would be appreciated.

It is not available on 8.17.X, you need to upgrade to 8.18.1.

The information is missing from the release notes, but the PR that added this feature is this one: (#34659) - Add Timezone Configuration to Watcher by lukewhiting · Pull Request #117033 · elastic/elasticsearch · GitHub

It is tagged with 8.18.0 and 9.0.0

Thank you @leandrojmp