Honolulu to London Time
HST to GMT Converter — 9 AM HST is 7:00 PM GMT
Honolulu is 10 hours behind London. Convert any time between Honolulu (HST) and London (GMT/BST) instantly.
Honolulu
United States
London
United Kingdom
Add Time Zones to Compare
Time Zone Comparison
Honolulu to London Time Conversion Table
| Honolulu (HST) | London (GMT) |
|---|---|
| 12:00 AM | 11:00 AM |
| 2:00 AM | 1:00 PM |
| 4:00 AM | 3:00 PM |
| 6:00 AM | 5:00 PM |
| 8:00 AM | 7:00 PM |
| 10:00 AM | 9:00 PM |
| 12:00 PM | 11:00 PM |
| 2:00 PM | 1:00 AM |
| 4:00 PM | 3:00 AM |
| 6:00 PM | 5:00 AM |
| 8:00 PM | 7:00 AM |
| 10:00 PM | 9:00 AM |
Honolulu & London — Business & Scheduling Guide
Honolulu (United States) is a global financial and tech hub, with key industries in technology, finance, healthcare, and entertainment. London (United Kingdom) is a leading center for finance and international trade, known for finance, insurance, media, and professional services. With a 10-hour time difference, professionals frequently schedule cross-border calls between these two cities for international trade, remote team collaboration, and client meetings.
Scheduling Meetings Between Honolulu and London
With London 10 hours ahead of Honolulu, there is minimal overlap in standard business hours. Most teams alternate meeting times to share the burden of early-morning or late-evening calls fairly. US business hours typically run 9 AM–5 PM, with a culture that values punctuality and efficiency. British business culture values politeness and punctuality, with typical hours of 9 AM–5:30 PM. Consider recording meetings for those who can't attend live, and use shared documents for async collaboration.
Daylight Saving Time Considerations
London observes Daylight Saving Time (GMT/BST), while Honolulu stays on HST year-round. When London switches to daylight time, the effective time difference shifts by 1 hour. This typically happens in spring and fall, and the exact dates vary by country. If you have recurring cross-timezone meetings, recalculate the schedule after each DST transition.
HST to GMT — Quick Reference
HST (HST) stands for the timezone used in Honolulu, United States (UTC-10). GMT (GMT/BST) is the timezone used in London, United Kingdom (UTC+0). Honolulu is 10 hours behind London.
To convert HST to GMT, add 10 hours to HST time. For example, HST 9:00 AM = GMT 7:00 PM.
Key Facts
- •Time difference: Honolulu (UTC-10) is 10 hours behind London (UTC+0).
- •Daylight Saving Time: Honolulu does not observe DST (HST). London observes DST (GMT/BST).
- •Regions: Honolulu is located in United States and uses the HST time zone. London is located in United Kingdom and uses the GMT/BST time zone.
- •Best time to call: There are no overlapping standard work hours (9 AM - 5 PM) between these two cities.
Frequently Asked Questions
What is the time difference between Honolulu and London?
Honolulu is 10 hours behind London.
What time is it in London when it's 9 AM in Honolulu?
When it's 9:00 AM in Honolulu, it is 7:00 PM in London.
What time is 9 PM HST in GMT?
9 PM HST (Honolulu time) is 7:00 AM GMT (London time). This is a common time people check when scheduling evening calls across these two time zones.
When is the best time to schedule a meeting between Honolulu and London?
There are no overlapping standard work hours (9 AM - 5 PM) between these two cities.
How do I convert HST to GMT?
HST (HST) is the timezone for Honolulu, United States (UTC-10). GMT (GMT/BST) is the timezone for London, United Kingdom (UTC+0). Honolulu is 10 hours behind London. Quick examples: 9 AM HST = 7:00 PM GMT, 12 PM HST = 10:00 PM GMT, 3 PM HST = 1:00 AM GMT, 6 PM HST = 4:00 AM GMT.
Is Honolulu ahead of or behind London?
Honolulu is 10 hours behind London. When it's noon in Honolulu, it's 10:00 PM in London.
Does Honolulu or London change clocks for Daylight Saving Time?
No, Honolulu does not observe DST — it stays on HST year-round. London observes DST and switches between GMT/BST. Because only one city observes DST, the time difference shifts by 1 hour during transition periods (typically March/April and October/November).
Related Time Zone Conversions
More from Honolulu
Convert to London
Working across time zones?
Auto-sync calendar events into your timesheet — no matter what time zone your team is in. Connect Google Calendar, Teams, or Zoom and export a polished timesheet in seconds.
No credit card required. Free forever plan available.