Time difference between California and New York

Three hours, all year round

California is on Pacific Time and New York on Eastern Time. Both use daylight saving time and both switch on the same Sundays, so the difference stays at three hours in January and in July. When it is 9:00 AM in San Francisco it is noon in New York, and 6:00 PM in Manhattan is 3:00 PM in Los Angeles.

The only time the gap is different is the night of the change itself. New York changes at 2:00 AM Eastern, which is 11:00 PM Saturday in California. Until California reaches 2:00 AM Pacific, three hours later, the gap is 4 hours in March (14 March 2027) and 2 hours in November (7 November 2027). Nobody should be scheduling anything then, but if you are checking a flight status or a server log at that hour, this is why the timestamps seem off by one.

Startups, investors and the 6 AM stand-up

Many founders in the Bay Area raise money from investors in New York, and many New York companies hire engineers in California. For the Pacific side, an East Coast “9:00 AM” meeting is 6:00 AM, so teams that depend on early calls end up with a rotating burden. A common compromise is to protect 9:00 AM to 2:00 PM Pacific, which is noon to 5:00 PM in New York, as core hours and keep everything else asynchronous.

Investor meetings in New York are often held between 10:00 AM and 4:00 PM Eastern. That is 7:00 AM to 1:00 PM in California, so a founder flying out for a pitch day should expect a very early start on the first morning and an easy afternoon.

Families, kids and the evening call

The three-hour gap shapes family routines more than people expect. A child in New York who goes to bed at 8:00 PM does so at 5:00 PM California time, so grandparents on the West Coast often miss bedtime by hours and have to call at 3:00 PM Pacific to catch the early evening. A Sunday phone call at 5:00 PM Pacific is already 8:00 PM in New York, usually the tail end of dinner and bath time.

For college students, the Eastern campus day starts at what feels like dawn on the West Coast, and a parent in Los Angeles who wants to call after the first class should wait until about 10:00 AM Pacific, which is 1:00 PM in New York.

Remote teams and shared core hours

Distributed companies that hire across both coasts usually set core hours so that people on both sides can reach each other for part of the day. The window that works for a standard 9-to-5 on both sides is 9:00 AM to 2:00 PM Pacific, which is 12:00 PM to 5:00 PM Eastern, five hours in total. Stretching the day to 7:00 AM to 7:00 PM Pacific turns the overlap into 10:00 AM to 10:00 PM Eastern, which most people will not want to use.

Product launches and live streams that need both audiences are often set for 10:00 AM Pacific, which is 1:00 PM Eastern, early enough to avoid the East Coast late afternoon but late enough for the West Coast to be awake.

Coast-to-coast flights

A nonstop flight between Los Angeles and New York takes about five and a half hours, so a 6:00 AM Pacific departure lands at about 2:30 PM Eastern, and an evening red-eye leaving at 10:00 PM Pacific arrives in the early morning, around 6:30 AM in New York. Flying east you lose three hours; flying west you gain them. The westbound trip takes about six hours, so a 9:00 AM departure from New York lands at around noon Pacific, before most people have finished their morning.

Hawaii, Arizona and the places in between

Two nearby places break the pattern. Hawaii does not change its clocks, so it is two hours behind California in winter and three hours behind in summer, and five or six hours behind New York. Most of Arizona stays on Mountain Standard Time all year, so it is one hour ahead of California in winter and level with California in summer. If your colleague says they are in the Mountain zone, ask whether they are in Arizona.

Clock changes in 2026 and 2027

Because both states follow the US rules, the table lists a single row for each change. The gap on the day is three hours both before and after.

Every clock change that affects this pair

The gap, window by window

Business-hours overlap

Times in the table are in California time. The first column of results assumes a normal 9 AM to 5 PM day at both ends, using today’s offsets; the second uses July 2027; the third stretches both days to 7 AM to 10 PM, which is the realistic window when one team is willing to start early or finish late.

The overlap is the same all year, since both coasts move together. Try to keep important decisions in the 12:00 PM to 3:00 PM Eastern slot, which is 9:00 AM to noon in California, so neither side has to stretch.