What is the time difference between San Francisco and Singapore?

Singapore is 15 hours ahead of San Francisco. 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 Singapore from San Francisco?

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 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.

Does Singapore observe daylight saving time?

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

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

It is 03:00 in Singapore, and already the following day. That holds for the current offsets; it shifts by an hour around the daylight saving dates listed above.

Which time zones do San Francisco and Singapore use?

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

Convert San Francisco time to Singapore time

Singapore is 15 hours ahead of San Francisco right now, so midday in San Francisco lands in the small hours in Singapore.

Convert a time

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Date

Time

Converted time

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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 San Francisco, across for Singapore.

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

Daylight saving time

Singapore keeps one offset all year while San Francisco moves twice. That is the whole reason this difference is seasonal.

San Francisco

Observes daylight saving time

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

Singapore

Does not observe daylight saving time

Standard: UTC+8

When you can actually talk

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

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

Reference

The zone identifiers and offsets behind everything above.

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

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

Common questions

What is the time difference between San Francisco and Singapore?: Singapore is 15 hours ahead of San Francisco. 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 Singapore from San Francisco?: 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 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.
Does Singapore observe daylight saving time?: No. Singapore stays on UTC+8 all year, so its clocks never move.
If it is midday in San Francisco, what time is it in Singapore?: It is 03:00 in Singapore, and already the following day. That holds for the current offsets; it shifts by an hour around the daylight saving dates listed above.
Which time zones do San Francisco and Singapore use?: San Francisco uses America/Los_Angeles, currently UTC-7 (PDT), and Singapore uses Asia/Singapore, currently UTC+8. Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.