HST to BST Converter
Understanding HST and BST Time Zones
Hawaii Standard Time (HST)
Hawaii Standard Time is observed in undefined and uses the offset UTC-10. Major cities in this time zone include Honolulu, Maui. This time zone serves a significant global region with important economic and cultural hubs.
British Summer Time (BST)
British Summer Time operates at UTC+1, covering undefined. Key cities include London, Edinburgh, Manchester. The 11-hour forward offset from HST means that when professionals in Honolulu start their workday at 9:00 AM, it is already 8:00 PM in London.
HST is also commonly referred to as Hawaii Time, Honolulu time, Hawaiian time. BST is also known as UK summer time, London summer time, England time. So if you are searching for Hawaii Time to UK summer time, this is the same conversion as HST to BST.
Complete HST to BST Conversion Table
The table below shows every two-hour increment converted from Hawaii Standard Time to British Summer Time. Business hours (9 AM – 5 PM) are highlighted for easy scheduling reference.
| HST (Hawaii Standard Time) | BST (British Summer Time) |
|---|---|
| 12:00 AM (00:00) | 11:00 AM (11:00) |
| 2:00 AM (02:00) | 1:00 PM (13:00) |
| 4:00 AM (04:00) | 3:00 PM (15:00) |
| 6:00 AM (06:00) | 5:00 PM (17:00) |
| 8:00 AM (08:00) | 7:00 PM (19:00) |
| 10:00 AM (10:00) | 9:00 PM (21:00) |
| 12:00 PM (12:00) | 11:00 PM (23:00) |
| 2:00 PM (14:00) | 1:00 AM (01:00) (next day) |
| 4:00 PM (16:00) | 3:00 AM (03:00) (next day) |
| 6:00 PM (18:00) | 5:00 AM (05:00) (next day) |
| 8:00 PM (20:00) | 7:00 AM (07:00) (next day) |
| 10:00 PM (22:00) | 9:00 AM (09:00) (next day) |
Times shown in 12-hour and 24-hour format. Last updated 2026-03-09.
Scheduling Between HST and BST
Remote teams spanning Honolulu and London often adopt asynchronous practices to bridge the 11-hour gap. Tools like Slack, Loom, and Notion reduce the need for real-time overlap while keeping projects moving forward.
The large 11-hour gap between HST and BST means that finding overlapping working hours requires compromise from at least one side. Consider adopting asynchronous workflows — recorded video updates, shared documents, and time-zone-aware project management tools — to supplement the limited real-time overlap.
Travel Between Honolulu and London
When arriving in London from Honolulu, immediately set all devices to local time. Exposure to natural daylight at the destination helps reset your circadian rhythm. Eastbound travelers should seek morning light.
Medical experts recommend allowing approximately one day of adjustment per hour of time difference. For the 11-hour shift between HST and BST, plan for roughly one week of gradual adjustment for optimal performance.
Daylight Saving Time Considerations
Keep in mind that DST transition dates differ between regions. The US changes clocks in March and November, Europe in March and October, and Australia in April and October. This can cause temporary shifts in conversion results.
For the HST to BST conversion specifically: HST (UTC-10) does not observe DST, while BST (UTC+1) does observe DST. This means the offset between them changes by one hour seasonally — the usual 11-hour gap becomes 10 or 12 hours during DST transitions.
Related Time Zone Conversions
References & Resources
Frequently Asked Questions
HST (Hawaii Standard Time) is 11 hours behind BST (British Summer Time). HST is UTC-10 and BST is UTC+1.
When it is 12:00 PM (noon) in HST, it is 11:00 PM in BST.
The best overlap for business hours is approximately 8:00 PM to 4:00 AM BST, which corresponds to 9:00 AM to 5:00 PM in HST. Given the large gap, consider alternating between early and late meeting times.
Keep in mind that DST transition dates differ between regions. The US changes clocks in March and November, Europe in March and October, and Australia in April and October. This can cause temporary shifts in conversion results.