What is the time difference between Singapore and San Francisco?

San Francisco is 15 hours behind Singapore. That figure is current — it changes by an hour when either city starts or ends daylight saving, and the exact dates are listed above.

When is the best time to call San Francisco from Singapore?

There is no time inside normal working hours in both cities, so someone has to take the call outside them. The nearest workable windows are listed above — pick one and alternate who gets the awkward slot.

Does Singapore observe daylight saving time?

No. Singapore stays on UTC+8 all year, so its clocks never move.

Does San Francisco observe daylight saving time?

Yes. San Francisco runs on UTC-8 in winter and UTC-7 in summer. The next change is on 2026-11-01, when clocks go back by 60 minutes.

If it is midday in Singapore, what time is it in San Francisco?

It is 21:00 in San Francisco, still on the previous day. That holds for the current offsets; it shifts by an hour around the daylight saving dates listed above.

Which time zones do Singapore and San Francisco use?

Singapore uses Asia/Singapore, currently UTC+8, and San Francisco uses America/Los_Angeles, currently UTC-7 (PDT). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert Singapore time to San Francisco time

San Francisco is 15 hours behind Singapore right now, so midday in Singapore lands in the evening in San Francisco.

Convert a time

From

Date

Time

Converted time

—

The converter needs JavaScript to run. Everything below — offsets, daylight saving dates and the hour-by-hour table — is part of the page and works without it.

Hour by hour

The whole day mapped across: read down the left for Singapore, across for San Francisco.

Singapore	San Francisco
00:00	09:00previous day
01:00	10:00previous day
02:00	11:00previous day
03:00	12:00previous day
04:00	13:00previous day
05:00	14:00previous day
06:00	15:00previous day
07:00	16:00previous day
08:00	17:00previous day
09:00	18:00previous day
10:00	19:00previous day
11:00	20:00previous day
12:00	21:00previous day
13:00	22:00previous day
14:00	23:00previous day
15:00	00:00
16:00	01:00
17:00	02:00
18:00	03:00
19:00	04:00
20:00	05:00
21:00	06:00
22:00	07:00
23:00	08:00

Daylight saving time

San Francisco changes its clocks; Singapore does not. The difference between them therefore shifts by an hour twice a year.

Singapore

Does not observe daylight saving time

Standard: UTC+8

San Francisco

Observes daylight saving time

Standard: UTC-8
Daylight: UTC-7
Next change: 2026-11-01 −60m

When you can actually talk

A standard working day in Singapore and one in San Francisco do not overlap at all. Any call between them is early for one side or late for the other.

Singapore 08:00–18:00San Francisco 17:00–03:00
Singapore 00:00–08:00San Francisco 09:00–17:00

Reference

The zone identifiers and offsets behind everything above.

	Singapore	San Francisco
IANA zone	Asia/Singapore	America/Los_Angeles
Abbreviation	UTC+8	PDT
Standard offset	UTC+8	UTC-8
Daylight offset	—	UTC-7
Clock changes this year	0	2
Country	Singapore	United States

Example, not the current time. Live times appear once the page loads.

Common questions

What is the time difference between Singapore and San Francisco?: San Francisco is 15 hours behind Singapore. That figure is current — it changes by an hour when either city starts or ends daylight saving, and the exact dates are listed above.
When is the best time to call San Francisco from Singapore?: There is no time inside normal working hours in both cities, so someone has to take the call outside them. The nearest workable windows are listed above — pick one and alternate who gets the awkward slot.
Does Singapore observe daylight saving time?: No. Singapore stays on UTC+8 all year, so its clocks never move.
Does San Francisco observe daylight saving time?: Yes. San Francisco runs on UTC-8 in winter and UTC-7 in summer. The next change is on 2026-11-01, when clocks go back by 60 minutes.
If it is midday in Singapore, what time is it in San Francisco?: It is 21:00 in San Francisco, still on the previous day. That holds for the current offsets; it shifts by an hour around the daylight saving dates listed above.
Which time zones do Singapore and San Francisco use?: Singapore uses Asia/Singapore, currently UTC+8, and San Francisco uses America/Los_Angeles, currently UTC-7 (PDT). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.