Los Angeles — the anchor of Pacific Time
Los Angeles runs on Pacific Time (PST/PDT) — 3 h behind New York, 8 h behind London (winter) / 7 h (summer). Home to US West Coast entertainment industry, aerospace, and the southern edge of Silicon Valley. The 3-h coast-to-coast US gap means "12 PM ET / 9 AM PT" is the standard both-coasts wake-up meeting slot for national business.