SGT to London
-7hSGT
SGTSOURCELondon
BSTGreen rows indicate typical business hours (9 AM - 5 PM)
SGT and BST on the World Map
The map below highlights the SGT (Singapore Standard Time) and BST (Greenwich Mean Time) timezone regions across the globe.
SGT – Singapore Standard Time
UTC+08:00Singapore Standard Time (SGT) is the time zone for Singapore, 8 hours ahead of UTC.
- •Singapore uses UTC+08:00 despite being at about 104°E longitude (closer to UTC+07:00).
- •Singapore does not observe daylight saving time.
- •The Singapore Exchange (SGX) operates on SGT.
GMT – Greenwich Mean Time
UTC+00:00Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as UTC+00:00.
- •GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London.
- •The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
- •GMT and UTC are often used interchangeably, but UTC is based on atomic clocks.
- •Iceland uses GMT year-round and never observes daylight saving time.
- •The UK switches from GMT to BST (British Summer Time) in late March each year.
About London
WikipediaLondon, where Greenwich Mean Time (GMT) originates, is the world's leading financial center alongside New York. The city bridges European and American business hours.
Big Ben is actually the name of the bell inside the Elizabeth Tower, not the tower itself.
Time Conversion Guide: SGT to London
SGT runs on Singapore Standard Time (SGT) at UTC+08:00. London runs on British Summer Time (BST) at UTC+01:00, also currently on daylight saving time. That puts SGT 7 hours behind London — a difference of -7h at the current offsets.
In practice, when it is 9:00 AM in SGT it is 2:00 AM in London. Midnight in SGT is 5:00 PM in London.London observes daylight saving time while SGT does not, so the gap narrows or widens by an hour part of the year.
SGT to London time conversion table
| SGT (SGT) | London (BST) | Day |
|---|---|---|
| 12:00 AM | 5:00 PM | previous day |
| 6:00 AM | 11:00 PM | previous day |
| 7:00 AM | 12:00 AM | same day |
| 8:00 AM | 1:00 AM | same day |
| 9:00 AM | 2:00 AM | same day |
| 12:00 PM | 5:00 AM | same day |
| 3:00 PM | 8:00 AM | same day |
| 5:00 PM | 10:00 AM | same day |
| 6:00 PM | 11:00 AM | same day |
| 9:00 PM | 2:00 PM | same day |
Why people convert SGT to London time
- Scheduling a call from SGT to London: a 10:00 AM start in SGT lands at 3:00 AM in London, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both SGT and London are inside the 9-to-5 working day between 4:00 PM and 5:00 PM SGT time (9:00 AM–10:00 AM BST). That is roughly 1 hours of usable overlap.
- Coordinating a SGT-based team with London contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM SGT" is unambiguous; "3 PM" across a -7h gap is not.
- Block 4:00 PM–5:00 PM SGT as the recurring meeting window if you work primarily from SGT and need London colleagues present.
- London: Clocks fall back on Sun, Oct 25, 2026. Any meeting series spanning that date will shift by an hour in local time.
About SGT (Singapore Standard Time)
Singapore Standard Time (SGT) is used in Singapore year-round. Singapore does not observe daylight saving time. Despite being geographically close to the UTC+07:00 zone, Singapore uses UTC+08:00 to align with major trading partners like China, Hong Kong, and Malaysia. Singapore is a major global financial hub.
About GMT (Greenwich Mean Time)
Greenwich Mean Time (GMT) is the clock time at the Royal Observatory in Greenwich, London, which sits on the Prime Meridian (0° longitude). GMT serves as the reference point from which all other time zones are calculated. The United Kingdom uses GMT during winter months and switches to British Summer Time (BST, UTC+01:00) from late March to late October. Several West African nations use GMT year-round. GMT is often used interchangeably with UTC (Coordinated Universal Time), although technically they are different – UTC is based on atomic clocks while GMT is based on Earth's rotation.
Best time to call between SGT and London
Both SGT and London sit inside the 9 AM – 5 PM working day between 4:00 PM–5:00 PM SGT, which is 9:00 AM–10:00 AM BST. That gives roughly 1 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
SGT and London overlap for only 60 minutes (4:00 PM–5:00 PM SGT), so meetings have to be booked precisely.
SGT is 7 hours behind London (SGT UTC+08:00 → BST UTC+01:00). The shared working window is 4:00 PM–5:00 PM SGT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
SGT
Does not observe DST
London
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between SGT and London?
SGT (SGT, UTC+08:00) is 7 hours behind London (BST, UTC+01:00). The gap is currently -7h.
How do I convert SGT time to London time?
Add -7h to SGT local time. For example, 9:00 AM in SGT is 2:00 AM in London.
What time is it in London right now?
London uses BST at UTC+01:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -7h offset from SGT.
What is the best time to call London from SGT?
Call between 4:00 PM and 5:00 PM SGT — that maps to 9:00 AM–10:00 AM BST and keeps both parties inside the working day.
Which is behind, SGT or London?
SGT is 7 hours behind London. When it is 12:00 PM in SGT it is 5:00 AM in London.
Do SGT and London use different time zones?
SGT uses SGT at UTC+08:00, while London (UK) uses BST at UTC+01:00. The IANA identifiers are Asia/Singapore and Europe/London.
Does daylight saving time affect the SGT–London difference?
Yes at the moment: London is on daylight saving time and SGT is not, so the -7h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share SGT's time zone?
SGT also covers Singapore.
Which countries use SGT, SGT's zone?
SGT is used in Singapore.
Is there a day difference between SGT and London?
Not normally. The -7h gap only pushes the date over the previous day.
What is the time difference between SGT and London?
London is -7h from SGT.
What timezone is SGT in?
SGT operates on its local timezone.
What timezone is London in?
London, where Greenwich Mean Time (GMT) originates, is the world's leading financial center alongside New York. The city bridges European and American business hours.
What are the business hours in London?
Standard business hours in London are 9:00 AM - 5:00 PM GMT.
Which countries use SGT (Singapore Standard Time)?
SGT is used in Singapore.
Does SGT observe daylight saving time?
No, SGT does not observe daylight saving time and remains at UTC+08:00 year-round.
What are some interesting facts about SGT?
Singapore uses UTC+08:00 despite being at about 104°E longitude (closer to UTC+07:00). Singapore does not observe daylight saving time.
Which cities are in the GMT timezone?
Major cities in the GMT timezone include London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar.
What is the UTC offset for GMT?
Greenwich Mean Time (GMT) is at UTC+00:00. During daylight saving time, it shifts to BST.
What should I know about the GMT timezone?
GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London. The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
When is it midnight in SGT, what time is it in London?
When it is 12:00 AM (midnight) in SGT (SGT), it is -7h later in London (GMT).
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