Is Now a Good Time to Call San Francisco from Colombo?
Colombo is ahead by 12 hours 30 minutes
Colombo ↔ San Francisco
No overlap — one side will join outside working hours· Showing afternoon hours (12:00–20:00)
Colombo
San Francisco
Working hours: 09:00–17:00 local. Green = both working. Purple = one side only.
Quick time conversions: Colombo → San Francisco
Common reference points to help you plan across the time difference.
10:00 AM in Colombo corresponds exactly to 9:30 PM in San Francisco.(-1 day)
Colombo 1:00 PM — what's that in San Francisco?—12:30 AM
9:00 AMin Colombo→8:30 PMin San Francisco(-1 day)
At 6:00 PM Colombo time, you're looking at 5:30 AM in San Francisco.
11:00 AMin Colombo→10:30 PMin San Francisco(-1 day)
Frequently Asked Questions
Is San Francisco ahead of or behind Colombo?
Colombo and San Francisco are 12 hours 30 minutes apart. Colombo (Asia/Colombo) is ahead of San Francisco (America/Los_Angeles).
Is there a mutual working window between Colombo and San Francisco?
Colombo and San Francisco don't share standard business hours. Async tools or flexible scheduling are the practical approach.
Are there any upcoming DST changes for Colombo or San Francisco?
The 12 hours 30 minutes difference between Colombo and San Francisco is stable — no DST changes expected in the next 7 days.
What's midday in Colombo in San Francisco time?
When it is 12:00 noon in Colombo, it is 11:30 PM in San Francisco.
How do I find out what time it is in San Francisco from Colombo?
Simply drag the slider to your Colombo time — San Francisco and all other locations update in real time. Accuracy is to the minute, DST-aware.
Are there any upcoming public holidays in Colombo or San Francisco?
Yes — San Francisco has an upcoming public holiday: Labour Day on September 7. Check the holiday panel above before confirming meetings.
How do Colombo and San Francisco relate to UTC?
Colombo observes Asia/Colombo and San Francisco observes America/Los_Angeles. Their UTC offset difference is 12 hours 30 minutes.
If I send an email at 5:00 PM Colombo time, when does my contact in San Francisco receive it?
An email sent at 5 PM in Colombo lands at 4:30 AM in San Francisco. Your San Francisco contact won't see it until their workday begins.