SGT to PDT Converter
Convert time between Singapore Standard Time (SGT) and Pacific Daylight Time (PDT)
Singapore Standard Time (SGT)
Pacific Daylight Time (PDT)
Time Difference
Pacific Daylight Time (PDT) is 0 hours ahead of Singapore Standard Time (SGT)
Select Date
Select Time
Quick Reference
| SGT | PDT |
|---|---|
| 10:00 | 19:00 |
| 12:00 | 21:00 |
| 14:00 | 23:00 |
| 16:00 | 01:00 |
| 18:00 | 03:00 |
| 20:00 | 05:00 |
| 22:00 | 07:00 |
| 00:00 | 09:00 |
| 02:00 | 11:00 |
| 04:00 | 13:00 |
| 06:00 | 15:00 |
| 08:00 | 17:00 |
Top 10 Most Common Time Zones
| Abbreviation | Full Name | UTC Offset | Typical Use |
|---|---|---|---|
| UTC | Coordinated Universal Time | UTC ±0 | Global reference standard (servers, logs, APIs) |
| EST / EDT | Eastern (US) Time | UTC −5 / −4 | New York, Toronto — North American business hub |
| CST / CDT | Central (US) Time | UTC −6 / −5 | Chicago, Dallas — US central business region |
| PST / PDT | Pacific (US) Time | UTC −8 / −7 | San Francisco, Los Angeles — tech industry standard |
| GMT / BST | Greenwich Mean / British Summer Time | UTC 0 / +1 | UK, used globally as a reference with UTC |
| CET / CEST | Central European (Summer) Time | UTC +1 / +2 | Paris, Berlin, Amsterdam — EU business core |
| IST | India Standard Time | UTC +5:30 | India — major IT & outsourcing region |
| CST | China Standard Time | UTC +8 | Beijing, Shanghai — East Asia business hub |
| JST | Japan Standard Time | UTC +9 | Tokyo — finance & tech hub |
| AEST / AEDT | Australian Eastern (Daylight) Time | UTC +10 / +11 | Sydney, Melbourne — APAC regional business |
Why Time Zone Abbreviations Are Ambiguous
Unlike standardized identifiers (like America/New_York or Europe/London from the IANA tz database), abbreviations such as "CST" or "IST" are not globally unique. They can refer to different time zones depending on context — country, region, or even time of year (due to daylight saving time).
Common Ambiguous Time Zone Abbreviations
| Abbrev. | Common Meaning(s) | UTC Offset | Region(s) |
|---|---|---|---|
| CST | Central Standard Time / China Standard Time / Cuba Standard Time | UTC−6 / UTC+8 / UTC−5 | North America, China, Cuba |
| IST | Indian Standard Time / Irish Standard Time / Israel Standard Time | UTC+5:30 / UTC+1 / UTC+2 | India, Ireland, Israel |
| AST | Atlantic Standard Time / Arabia Standard Time | UTC−4 / UTC+3 | Caribbean, Canada, Middle East |
| PST | Pacific Standard Time / Philippine Standard Time | UTC−8 / UTC+8 | North America, Philippines |
| EST | Eastern Standard Time (North America / Australia) | UTC−5 / UTC+10 | North America, Australia |
✅ Best Practice
To avoid ambiguity, always:
- Use IANA tz identifiers — e.g.,
America/New_Yorkinstead of "EST" - Specify UTC offset explicitly — e.g.,
UTC−5when abbreviations must be used - Include the full timezone name — e.g., "Eastern Standard Time (EST)" with UTC offset
About SGT to PDT Time Conversion
Converting time between Singapore Standard Time (SGT) and US Pacific Daylight Time (PDT) is essential for coordinating with the US West Coast during the summer half-year. SGT is UTC+8 year-round, while PDT is UTC-7, placing Singapore 15 hours ahead of PDT from mid-March to early November. Outside PDT the region observes PST (UTC-8) and the gap grows to 16 hours.
This time zone converter uses the IANA timezone database to ensure accurate calculations and automatically handles the PST/PDT switch. Singapore never observes daylight saving, so the seasonal variation in the SGT-Pacific US offset comes entirely from the American side. Whether you're scheduling Singapore-San Francisco business calls during US summer, planning travel, or coordinating with partners in Los Angeles, Seattle or Vancouver, our converter provides reliable results.
Common Use Cases for SGT to PDT Conversion
Business & Work
- Scheduling summer meetings between Singapore and San Francisco, Seattle or Los Angeles offices
- Coordinating with Silicon Valley tech partners during US daylight saving
- Planning conference calls with US West Coast teams while PDT is in effect
Personal & Travel
- Planning travel between Singapore and the US West Coast in the summer
- Coordinating with family and friends in California, Oregon, Washington or British Columbia
- Scheduling virtual events bridging Asia and the US West Coast
Time Zone Information
Singapore Standard Time (SGT)
- UTC Offset: UTC+8
- IANA Timezone: Asia/Singapore
- Daylight Saving: No daylight saving time (consistent year-round)
- Major Cities: Singapore
- Coverage: Republic of Singapore
Pacific Daylight Time (PDT)
- UTC Offset: UTC-7
- IANA Timezone: America/Los_Angeles
- Daylight Saving: Active from second Sunday in March to first Sunday in November (reverts to PST UTC-8)
- Major Cities: Los Angeles, San Francisco, San Jose, San Diego, Seattle, Portland, Vancouver
- Coverage: US West Coast and western Canada during DST
Quick Reference: SGT to PDT
Remember: PDT is 15 hours behind SGT. Outside US daylight saving (early November to mid-March), the US West Coast is on PST and the gap grows to 16 hours.
Frequently Asked Questions
What is the time difference between SGT and PDT?
Singapore Standard Time (SGT) is UTC+8, while US Pacific Daylight Time (PDT) is UTC-7. SGT is 15 hours ahead of PDT. When it is 12:00 PM in Singapore, it is 9:00 PM the previous day in Los Angeles or San Francisco.
When is PDT in effect?
PDT applies from the second Sunday in March to the first Sunday in November. Outside that window the US West Coast is on PST (UTC-8) and the SGT gap grows to 16 hours.
Does Singapore observe daylight saving time?
No. Singapore stays on SGT (UTC+8) year-round. Any seasonal shift in the SGT-PDT offset is driven by the US West Coast switching between PST and PDT.
What are the best times for SGT-PDT business calls?
The SGT-PDT offset is large (15 hours) so live overlap is narrow. Singapore evening (9:00 to 11:00 PM SGT) maps to US West Coast morning (6:00 to 8:00 AM PDT). For a US West Coast afternoon slot, very early Singapore morning (5:00 to 7:00 AM SGT) reaches 2:00 to 4:00 PM PDT.
Which countries or regions use PDT?
PDT is observed across the US West Coast during daylight saving — California, Oregon, Washington, parts of Nevada, plus western Canada including Vancouver. Major cities include Los Angeles, San Francisco, San Jose, San Diego, Seattle, Portland and Vancouver.
Which countries or regions use SGT?
Singapore Standard Time is used only in the Republic of Singapore. UTC+8 is shared with Malaysia, Western Australia, Hong Kong, the Philippines and most of mainland China.
Pro Tips
- • PDT is 15 hours behind SGT — Singapore noon is 9 PM the previous day in San Francisco.
- • Outside PDT (early November to mid-March), the US West Coast is on PST and the offset becomes 16 hours. Refresh recurring invites near the DST transitions.
- • Singapore never observes DST, so all seasonal variation in the offset comes from the US side.
- • Singapore evening (9:00 to 11:00 PM SGT) is the cleanest overlap with US West Coast morning business hours.
- • For a US West Coast afternoon slot, you will need an early Singapore morning call — plan accordingly.
- • Use IANA identifier America/Los_Angeles in calendars to handle the PST/PDT switch automatically.