San Francisco is typically 8 hours behind Dublin. When it's 5:00 PM in Dublin, it's 9:00 AM in San Francisco. Both cities observe daylight saving time, though the transition dates differ slightly.
During the brief periods when the US and Ireland change clocks on different weekends (usually in March and November), the difference can temporarily be 7 or 9 hours. For most of the year, it's a consistent 8-hour difference.
Optimal meeting window: 6:00 AM - 9:00 AM San Francisco time (2:00 PM - 5:00 PM Dublin). This catches afternoon business hours in Dublin while being early morning in SF.
San Francisco tech companies have extensive operations in Dublin, which serves as the European headquarters for many Silicon Valley giants including Google, Meta, and Apple.