Offset
The time difference between San Francisco and Chennai is 12.5 hours.
San Francisco (PDT) is behind Chennai (IST).
PDT: UTC-7
IST: UTC+5:30
San Francisco is currently observing daylight saving time; Chennai is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in San Francisco and Chennai don't overlap on the same weekday. Chennai is 13 hours ahead of San Francisco.
With some flexibility, there are two workable windows outside standard hours, depending on which side takes the early or late slot:
- 7 AM–8 AM in San Francisco (7 PM–8 PM in Chennai) — suggest 7:00 AM San Francisco (7:30 PM Chennai).
- 7 PM–8 PM in San Francisco (7 AM–8 AM the next day in Chennai) — suggest 7:00 PM San Francisco (7:30 AM Chennai).
Either is an early start or late finish for one side, but workable for a one-off meeting.
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
United States
- New Year's DayThu, Jan 1
- Martin Luther King, Jr. DayMon, Jan 19
- Presidents DayMon, Feb 16
- Memorial DayMon, May 25
- Juneteenth National Independence DayFri, Jun 19
- Independence DayFri, Jul 3
- Labour DayMon, Sep 7
- Columbus DayMon, Oct 12
- Veterans DayWed, Nov 11
- Thanksgiving DayThu, Nov 26
- Christmas DayFri, Dec 25
About these zones
San Francisco uses Pacific Time (PST, or PDT). To call United States, dial +1.
Chennai uses India Standard Time (IST). To call India, dial +91.
Chennai is approximately 8,650 miles northwest of San Francisco.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| San Francisco | Chennai | Day |
|---|---|---|
| 12:00 am | 12:30 pm | Same day |
| 1:00 am | 1:30 pm | Same day |
| 2:00 am | 2:30 pm | Same day |
| 3:00 am | 3:30 pm | Same day |
| 4:00 am | 4:30 pm | Same day |
| 5:00 am | 5:30 pm | Same day |
| 6:00 am | 6:30 pm | Same day |
| 7:00 am | 7:30 pm | Same day |
| 8:00 am | 8:30 pm | Same day |
| 9:00 am | 9:30 pm | Same day |
| 10:00 am | 10:30 pm | Same day |
| 11:00 am | 11:30 pm | Same day |
| 12:00 pm | 12:30 am | +1 day |
| 1:00 pm | 1:30 am | +1 day |
| 2:00 pm | 2:30 am | +1 day |
| 3:00 pm | 3:30 am | +1 day |
| 4:00 pm | 4:30 am | +1 day |
| 5:00 pm | 5:30 am | +1 day |
| 6:00 pm | 6:30 am | +1 day |
| 7:00 pm | 7:30 am | +1 day |
| 8:00 pm | 8:30 am | +1 day |
| 9:00 pm | 9:30 am | +1 day |
| 10:00 pm | 10:30 am | +1 day |
| 11:00 pm | 11:30 am | +1 day |
Daylight saving time
San Francisco observes daylight saving time; Chennai does not. The offset between the two zones changes when San Francisco transitions: on Sunday, November 1, 2026, clocks fall back from PDT to PST.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 5:49 AM
- Sunset
- 8:30 PM
- Day length
- 14h 42m
- Sunrise
- 5:43 AM
- Sunset
- 6:35 PM
- Day length
- 12h 52m
Daylight overlap: 3h 18m — 5:13 PM–8:30 PM in San Francisco (5:43 AM–9:00 AM in Chennai). Both locations are in daylight during this window.
Cities in these zones
Other cities in Pacific Time
Other cities in India Standard Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Pacific Time
- BUR
- HHR
- LAX
- LGB
- SNA
- CLD
- SAN
- TIJ
- OAK
- SFO
Airports in India Standard Time
- BOM
- NMI
- DEL
- BLR
- HYD
- AMD
- MAA
- CCU
- STV
- PNQ
Related conversions
Common conversions
- What is 9:00 am San Francisco in Chennai?
- 9:00 am San Francisco is 9:30 pm Chennai.
- What is 12:00 pm San Francisco in Chennai?
- 12:00 pm San Francisco is 12:30 am Chennai, the next day.
- What is 12:30 pm San Francisco in Chennai?
- 12:30 pm San Francisco is 1:00 am Chennai, the next day.
- What is 2:00 pm San Francisco in Chennai?
- 2:00 pm San Francisco is 2:30 am Chennai, the next day.
- What is 5:00 pm San Francisco in Chennai?
- 5:00 pm San Francisco is 5:30 am Chennai, the next day.
- What is 11:30 pm San Francisco in Chennai?
- 11:30 pm San Francisco is 12:00 pm Chennai, the next day.