Los Angeles operates on the America/Los_Angeles timezone, switching between PST (Pacific Standard Time, UTC −8:00) in winter and PDT (Pacific Daylight Time, UTC −7:00) from mid-March to early November. As California's largest city and the centre of the US entertainment, technology, and media industries, Los Angeles time matters to studios, streaming platforms, and tech companies worldwide.
LA is home to major studios (Warner Bros., Universal, Disney, Netflix) whose release schedules, earnings calls, and launch events are set in Pacific Time. Silicon Valley, just 400 miles north, shares the same timezone, meaning the entire US tech industry — from San Jose to Los Angeles — operates on a single clock. When a major tech company announces a product at 10:00 AM PDT, it's 1:00 PM ET in New York, 6:00 PM BST in London, and 1:00 AM the next day in Singapore.
Time differences from Los Angeles: New York is always 3 hours ahead. London (GMT) is 8 hours ahead during PST and 7 hours ahead during PDT. Mumbai (IST) is 13.5 hours ahead in winter and 12.5 hours ahead in summer. Tokyo (JST) is 17 hours ahead during PST. This means a 10:00 AM Monday call in LA is a 3:00 AM Tuesday call in Tokyo — demonstrating the challenge of scheduling Asia-Pacific meetings from the US West Coast.
Los Angeles observes daylight saving time on the same schedule as the rest of the US: clocks move forward on the second Sunday in March at 2:00 AM and move back on the first Sunday in November at 2:00 AM. California has explored ending DST through Proposition 7 (passed in 2018), but changing clocks requires federal approval, which has not yet been granted — so Los Angeles continues on the standard US DST schedule.