BST to AKDT Converter
Convert time between British Summer Time (BST) and Alaska Daylight Time (AKDT)
British Summer Time (BST)
Alaska Daylight Time (AKDT)
Time Difference
Alaska Daylight Time (AKDT) is 0 hours ahead of British Summer Time (BST)
Select Date
Select Time
Quick Reference
| BST | AKDT |
|---|---|
| 03:00 | 18:00 |
| 05:00 | 20:00 |
| 07:00 | 22:00 |
| 09:00 | 00:00 |
| 11:00 | 02:00 |
| 13:00 | 04:00 |
| 15:00 | 06:00 |
| 17:00 | 08:00 |
| 19:00 | 10:00 |
| 21:00 | 12:00 |
| 23:00 | 14:00 |
| 01:00 | 16:00 |
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 BST to AKDT Time Conversion
Converting time between British Summer Time (BST) and Alaska Daylight Time (AKDT) bridges London, Manchester, and the rest of the UK with Anchorage and Fairbanks. BST is UTC+1 while AKDT is UTC-8, placing AKDT 9 hours behind BST during overlapping daylight saving periods.
This converter uses the IANA timezone database to ensure accurate calculations through DST transitions in both regions. BST runs from the last Sunday in March until the last Sunday in October, and AKDT is in effect from March to November — an almost identical window. Use this converter for scheduling meetings, planning travel, or coordinating across these regions.
Common Use Cases for BST to AKDT Conversion
Business & Work
- Scheduling meetings between UK-based teams and Alaska partners
- Coordinating project deadlines across the United Kingdom and Alaska
- Planning conference calls between London and Anchorage during shared daylight saving periods
Personal & Travel
- Planning travel itineraries between the UK and Alaska
- Coordinating with family and friends in Alaska from Britain
- Scheduling virtual events for BST and AKDT audiences
Time Zone Information
British Summer Time (BST)
- UTC Offset: UTC+1 (UTC+0 during GMT)
- IANA Timezone: Europe/London
- Daylight Saving: Last Sunday in March to Last Sunday in October
- Major Cities: London, Manchester, Birmingham, Edinburgh, Glasgow, Cardiff
- Coverage: United Kingdom during daylight saving period
Alaska Daylight Time (AKDT)
- UTC Offset: UTC-8
- IANA Timezone: America/Anchorage
- Daylight Saving: Second Sunday in March to First Sunday in November
- Major Cities: Anchorage, Fairbanks, Juneau, Sitka
- Coverage: Most of Alaska during daylight saving period
Quick Reference: BST to AKDT
Remember: AKDT is always 9 hours behind BST during overlapping daylight saving periods
Frequently Asked Questions
What is the time difference between BST and AKDT?
British Summer Time (BST) is UTC+1, while Alaska Daylight Time (AKDT) is UTC-8. AKDT is 9 hours behind BST. When it is 12:00 PM in London, it is 3:00 AM in Anchorage.
When does this BST to AKDT conversion apply?
BST runs from the last Sunday in March until the last Sunday in October. AKDT runs from the second Sunday in March to the first Sunday in November. The two windows overlap for most of the northern summer.
How does the time difference change throughout the year?
When the UK reverts to GMT (UTC+0) in late October and Alaska reverts to AKST (UTC-9) in early November, the offset stays at 9 hours. Around DST transitions in late March and late October the offsets briefly diverge by an hour.
What are the best times for BST-AKDT business calls?
Late afternoon in London (5:00 PM BST) is 8:00 AM in Anchorage — a strong morning for AKDT and a workable late afternoon for BST. The 9-hour gap leaves overlap mostly at the edges of each working day.
Which countries/regions use AKDT timezone?
AKDT covers most of Alaska during daylight saving, including Anchorage, Fairbanks, Juneau, and Sitka. The Aleutian Islands use Hawaii-Aleutian Time and follow a different rule set.
Which countries/regions use BST timezone?
BST is observed throughout the United Kingdom, including London, Manchester, Birmingham, Edinburgh, Glasgow, and Cardiff. It is the daylight saving variant of Greenwich Mean Time (GMT).
Pro Tips
- • AKDT is 9 hours behind BST — subtract 9 hours from a London time to get the Anchorage time.
- • Most BST to AKDT conversions stay on the same calendar day in the morning, and shift to early-morning Alaska for late-day BST.
- • Best meeting window: 5:00–7:00 PM BST overlaps with 8:00–10:00 AM AKDT.
- • When the UK switches to GMT in late October and Alaska switches to AKST in early November, the 9-hour offset is preserved.
- • Use IANA identifiers (Europe/London and America/Anchorage) in calendar tools to handle DST transitions automatically.
- • In late March and late October, DST transitions in either region can briefly change the offset by an hour. Confirm before scheduling around those dates.