Seattle is typically 9 hours behind Paris. When it's 5:00 PM in Paris, it's 8:00 AM in Seattle. Both cities observe daylight saving time, though the transition dates differ slightly.
During the brief periods when the US and Europe change clocks on different weekends (usually in March and November), the difference can temporarily be 8 or 10 hours. For most of the year, it's a consistent 9-hour difference.
Optimal meeting window: 7:00 AM - 9:00 AM Seattle time (4:00 PM - 6:00 PM Paris). This catches late afternoon business hours in Paris while being early morning in Seattle.
Seattle's tech giants often coordinate with European headquarters and partners during these early morning windows.