WP-CalDav2ICS

This plugin converts remote CalDAV calendars into ICS files that can be used with any calendar plugin on your site. It is designed for site owners who need to publish events from a CalDAV server (such as Baikal, Synology NAS, or mailbox.org) without manual export.

• Multiple calendar sources: Starting from version 1.1.0, you can convert several CalDAV calendars at once. Each source is configured separately on the admin page.
• Automatic scheduling: ICS files are regenerated at set intervals using WP-Cron. You can verify the schedule with tools like WP Crontrol.
• Server compatibility: Works with Baikal/Sabre.io, Synology NAS, and mailbox.org/OX servers. If your server returns an unparseable response, you can open a support ticket or patch the parser yourself.
• Logging and debugging: Enable logging to troubleshoot connection or parsing issues. Log entries exclude usernames and passwords for security.
• URL validation: Accepts hostnames (not local IP ranges like 192.168.x.x). For local servers, add a hostname entry in your /etc/hosts file.

The plugin has not been tested with the latest three major WordPress releases and may have compatibility issues with newer versions. It requires PHP 5.6 or higher and WordPress 4.4 or higher. Active installations are around 200+.