During their work on the opencast-admin-interface and opencast/opencast repositories, Jan Duehring focused on enhancing event scheduling and content discovery features. They addressed cross-time-zone inconsistencies by refactoring recurring event handling to use UTC-based logic, improving data integrity for multi-region deployments. In the opencast repository, Jan implemented LTI tool enhancements, enabling sorting of search results by Dublin Core metadata fields and created date, with support for ascending and descending order. These changes, developed primarily in TypeScript and Java, included updated API endpoints and documentation, resulting in more reliable scheduling and flexible integration options for developers and external platforms.