[Bug]: Calendar event recurrence

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

Hello, I think there is a little bug in storing event recurrences. If you create an event like this:

01.01.2024, whole day
repeat: yearly (APR, MAI, JUN)
on: second Monday
endless

This event will be shown in the nextcloud web calendar but is not shown when accessing by another calendar app through nextcloud calDAV Server. I tried with Mac OS Calendar and Android (DAVX5).

There is also a little translation bug when you define the "on" (first, second, third, fourth, fifth, penultimate day, last day). the "second" is always in english language whether the locale is set to.

regards!

Steps to reproduce

set the event like described and you may see

Expected behavior

the event should be visible when requested by nextcloud calDAV server

Nextcloud Server version

30

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.2

Web server

Apache (supported)

Database engine version

MariaDB

Is this bug present after an update or on a fresh install?

Fresh Nextcloud Server install

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

No response

List of activated Apps

No response

Nextcloud Signing status

No response

Nextcloud Logs

No response

Additional info

No response