Dublin is exactly 1 hour behind Berlin year-round. When it's 3:00 PM in Berlin, it's 2:00 PM in Dublin. Both cities observe daylight saving time on the same schedule.
Ireland uses Irish Standard Time (IST)/Greenwich Mean Time (GMT), while Germany uses Central European Time (CET). The 1-hour difference remains constant throughout the year.
Any business hours work great! With only a 1-hour difference, 9:00 AM - 5:00 PM Dublin corresponds to 10:00 AM - 6:00 PM Berlin. Full business day overlap.
Dublin's tech hub (Google, Facebook European HQs) and Berlin's startup scene have strong connections. Many tech professionals travel between these EU tech capitals regularly.