Los Angeles to AST
+3hLos Angeles
PDTSOURCEAST
ASTGreen rows indicate typical business hours (9 AM - 5 PM)
PDT and AST on the World Map
The map below highlights the PDT (Pacific Standard Time) and AST (Atlantic Standard Time) timezone regions across the globe.
PST – Pacific Standard Time
UTC-08:00Pacific Standard Time (PST) is the time zone for the US and Canadian Pacific coast, 8 hours behind UTC.
- •Silicon Valley and the world's biggest tech companies operate on Pacific Time.
- •The Hollywood film industry runs on PST/PDT.
- •PST is 3 hours behind EST, creating a significant business hours gap.
- •Vancouver, Canada's third-largest city, uses PST.
AST – Atlantic Standard Time
UTC-04:00Atlantic Standard Time (AST) is the time zone for the Canadian Atlantic provinces and the Caribbean, 4 hours behind UTC.
- •Puerto Rico uses AST year-round and does not observe DST.
- •AST is 1 hour ahead of EST.
- •Halifax, the capital of Nova Scotia, is the largest city in AST Canada.
About Los Angeles
WikipediaLos Angeles operates on Pacific Time (PST/PDT), 3 hours behind New York. As the entertainment capital, LA time is important for media and tech industries.
Los Angeles is the entertainment capital of the world, home to Hollywood and major film studios.
Los Angeles vs AST: Offsets, DST and Best Call Times
Los Angeles runs on Pacific Daylight Time (PDT) at UTC-07:00, currently observing daylight saving time. AST runs on Atlantic Standard Time (AST) at UTC-04:00. That puts Los Angeles 3 hours ahead of AST — a difference of +3h at the current offsets.
In practice, when it is 9:00 AM in Los Angeles it is 12:00 PM in AST. Midnight in Los Angeles is 3:00 AM in AST.Los Angeles observes daylight saving time while AST does not, so the gap narrows or widens by an hour part of the year.
Los Angeles to AST time conversion table
| Los Angeles (PDT) | AST (AST) | Day |
|---|---|---|
| 12:00 AM | 3:00 AM | same day |
| 6:00 AM | 9:00 AM | same day |
| 7:00 AM | 10:00 AM | same day |
| 8:00 AM | 11:00 AM | same day |
| 9:00 AM | 12:00 PM | same day |
| 12:00 PM | 3:00 PM | same day |
| 3:00 PM | 6:00 PM | same day |
| 5:00 PM | 8:00 PM | same day |
| 6:00 PM | 9:00 PM | same day |
| 9:00 PM | 12:00 AM | next day |
Why people convert Los Angeles to AST time
- Scheduling a call from Los Angeles to AST: a 10:00 AM start in Los Angeles lands at 1:00 PM in AST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Los Angeles and AST are inside the 9-to-5 working day between 9:00 AM and 2:00 PM PDT time (12:00 PM–5:00 PM AST). That is roughly 5 hours of usable overlap.
- Watching a live event or market open: Los Angeles viewers need 12:00 PM in AST to catch a 9:00 AM start there, and 9:00 PM if the event is anchored to Los Angeles.
- Always state the zone abbreviation, not just the hour. "3:00 PM PDT" is unambiguous; "3 PM" across a +3h gap is not.
- Block 9:00 AM–2:00 PM PDT as the recurring meeting window if you work primarily from Los Angeles and need AST colleagues present.
- Los Angeles: Clocks fall back on Sun, Nov 1, 2026. Re-check this page after that date because the offset changes and so does the +3h gap.
About PST (Pacific Standard Time)
Pacific Standard Time (PST) covers the west coast of North America, including tech hubs like San Francisco and Seattle, and entertainment capital Los Angeles. The Pacific Time Zone is home to Silicon Valley and the world's largest technology companies. During summer, clocks advance to Pacific Daylight Time (PDT, UTC-07:00). PST is also observed in Baja California, Mexico.
About AST (Atlantic Standard Time)
Atlantic Standard Time (AST) covers Canada's Atlantic provinces (Nova Scotia, New Brunswick, Prince Edward Island, and most of Labrador), as well as several Caribbean nations. Puerto Rico and the US Virgin Islands use AST year-round without daylight saving time. The Canadian provinces switch to Atlantic Daylight Time (ADT) in summer.
Best time to call between Los Angeles and AST
Both Los Angeles and AST sit inside the 9 AM – 5 PM working day between 9:00 AM–2:00 PM PDT, which is 12:00 PM–5:00 PM AST. That gives roughly 5 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Los Angeles and AST share 5 hours of working-hours overlap (9:00 AM–2:00 PM PDT), so scheduling a live meeting is straightforward.
Los Angeles is 3 hours ahead of AST (PDT UTC-07:00 → AST UTC-04:00). The shared working window is 9:00 AM–2:00 PM PDT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Los Angeles
☀ Currently in DST
Standard: UTC-08:00 · DST: UTC-07:00
Clocks fall back on Sun, Nov 1, 2026
AST
☀ Currently in DST
Standard: UTC-04:00 · DST: UTC-03:00
Clocks fall back on Sun, Nov 1, 2026
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between Los Angeles and AST?
Los Angeles (PDT, UTC-07:00) is 3 hours ahead of AST (AST, UTC-04:00). The gap is currently +3h.
How do I convert Los Angeles time to AST time?
Add +3h to Los Angeles local time. For example, 9:00 AM in Los Angeles is 12:00 PM in AST.
What time is it in AST right now?
AST uses AST at UTC-04:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +3h offset from Los Angeles.
What is the best time to call AST from Los Angeles?
Call between 9:00 AM and 2:00 PM PDT — that maps to 12:00 PM–5:00 PM AST and keeps both parties inside the working day.
Which is ahead, Los Angeles or AST?
Los Angeles is 3 hours ahead of AST. When it is 12:00 PM in Los Angeles it is 3:00 PM in AST.
Do Los Angeles and AST use different time zones?
Los Angeles (USA) uses PDT at UTC-07:00, while AST uses AST at UTC-04:00. The IANA identifiers are America/Los_Angeles and America/Halifax.
Does daylight saving time affect the Los Angeles–AST difference?
Yes at the moment: Los Angeles is on daylight saving time and AST is not, so the +3h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share Los Angeles's time zone?
PDT also covers Los Angeles, San Francisco, Seattle, Vancouver, San Diego, Portland, Las Vegas, Sacramento and 2 more.
Which countries use PDT, Los Angeles's zone?
PDT is used in United States (Pacific), Canada (British Columbia), Mexico (Baja California).
Is there a day difference between Los Angeles and AST?
Not normally. The +3h gap only pushes the date over for late-evening times.
What is the time difference between Los Angeles and AST?
AST is +3h from Los Angeles.
What timezone is Los Angeles in?
Los Angeles operates on Pacific Time (PST/PDT), 3 hours behind New York. As the entertainment capital, LA time is important for media and tech industries.
What timezone is AST in?
AST operates on its local timezone.
What are the business hours in Los Angeles?
Standard business hours in Los Angeles are 9:00 AM - 5:00 PM PST.
Which countries use PST (Pacific Standard Time)?
PST is used in United States (Pacific), Canada (British Columbia), Mexico (Baja California).
Does PST observe daylight saving time?
Yes, PST switches to PDT during summer months.
What are some interesting facts about PST?
Silicon Valley and the world's biggest tech companies operate on Pacific Time. The Hollywood film industry runs on PST/PDT.
Which cities are in the AST timezone?
Major cities in the AST timezone include Halifax, San Juan, Santo Domingo, Caracas, La Paz, Fredericton, Charlottetown.
What is the UTC offset for AST?
Atlantic Standard Time (AST) is at UTC-04:00. During daylight saving time, it shifts to ADT.
What should I know about the AST timezone?
Puerto Rico uses AST year-round and does not observe DST. AST is 1 hour ahead of EST.
When is it midnight in Los Angeles, what time is it in AST?
When it is 12:00 AM (midnight) in Los Angeles (PST), it is +3h later in AST (AST).
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