We are co-organizing the seventeenth year of the Prague PostgreSQL Developers Day (P2D2) conference. The two-day event will offer workshops and lectures on the relational and open-source database system PostgreSQL. Among the invited speakers are members of the core team of this database. This year, we can look forward to three times as many lectures in three parallel sections. We are also adding a third line of workshops. The workshops will focus on query optimization, running PostgreSQL in Kubernetes, Postgres hacking, and tools for connection pooling and monitoring. The event is paid, and registration is required.