AKDT to HST Converter
Convert time between Alaska Daylight Time (AKDT) and Hawaii Standard Time (HST)
Alaska Daylight Time (AKDT)
Hawaii Standard Time (HST)
Time Difference
Hawaii Standard Time (HST) is 0 hours ahead of Alaska Daylight Time (AKDT)
Select Date
Select Time
Quick Reference
| AKDT | HST |
|---|---|
| 18:00 | 16:00 |
| 20:00 | 18:00 |
| 22:00 | 20:00 |
| 00:00 | 22:00 |
| 02:00 | 00:00 |
| 04:00 | 02:00 |
| 06:00 | 04:00 |
| 08:00 | 06:00 |
| 10:00 | 08:00 |
| 12:00 | 10:00 |
| 14:00 | 12:00 |
| 16:00 | 14:00 |
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 AKDT to HST Time Conversion
Converting time between Alaska Daylight Time (AKDT) and Hawaii Standard Time (HST) bridges Anchorage and Fairbanks with Honolulu, Hilo, and the rest of Hawaii. AKDT is UTC-8 while HST is UTC-10, placing HST 2 hours behind AKDT.
This converter uses the IANA timezone database for accurate calculations. Hawaii does not observe daylight saving time, so HST is constant year-round. AKDT is in effect from March to November; during the rest of the year Alaska uses AKST (UTC-9), and the offset to HST shrinks to 1 hour.
Common Use Cases for AKDT to HST Conversion
Business & Work
- Scheduling meetings between Alaska-based teams and Hawaii-based partners
- Coordinating tourism, fishing, and military operations across the Pacific
- Planning conference calls between Anchorage and Honolulu
Personal & Travel
- Planning travel itineraries between Alaska and Hawaii
- Coordinating with family and friends in Hawaii
- Scheduling virtual events for AKDT and HST audiences
Time Zone Information
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
Hawaii Standard Time (HST)
- UTC Offset: UTC-10
- IANA Timezone: Pacific/Honolulu
- Daylight Saving: Hawaii does not observe daylight saving time
- Major Cities: Honolulu, Hilo, Kailua, Pearl City, Kaneohe
- Coverage: Hawaii year-round
Quick Reference: AKDT to HST
Remember: HST is 2 hours behind AKDT during Alaska's daylight saving period. After DST ends in November, the offset shrinks to 1 hour (AKST to HST).
Frequently Asked Questions
What is the time difference between AKDT and HST?
Alaska Daylight Time (AKDT) is UTC-8, while Hawaii Standard Time (HST) is UTC-10. HST is 2 hours behind AKDT. When it is 12:00 PM in Anchorage, it is 10:00 AM in Honolulu.
When does this AKDT to HST conversion apply?
AKDT runs from the second Sunday in March to the first Sunday in November. Hawaii does not observe DST and stays on HST year-round. The 2-hour offset applies during Alaska's DST window.
How does the time difference change throughout the year?
When Alaska reverts to AKST (UTC-9) in November, the offset to HST shrinks to 1 hour. HST itself never changes because Hawaii does not observe daylight saving.
What are the best times for AKDT-HST business calls?
Most working hours overlap cleanly. 9:00 AM–5:00 PM AKDT corresponds to 7:00 AM–3:00 PM HST — both regions are awake and at work for most of that span.
Which countries/regions use HST timezone?
HST is observed in Hawaii and parts of the Aleutian Islands (specifically the western Aleutians and Hawaii proper). Major cities include Honolulu, Hilo, Kailua, Pearl City, and Kaneohe.
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.
Pro Tips
- • HST is 2 hours behind AKDT — subtract 2 hours from an Anchorage time to get the Honolulu time.
- • Both regions sit in the Pacific. Most working hours overlap cleanly — easy real-time collaboration.
- • Best meeting window: 10:00 AM–4:00 PM AKDT overlaps with 8:00 AM–2:00 PM HST.
- • Hawaii never observes DST. Only the AKDT side shifts; HST is constant year-round.
- • Use IANA identifiers (America/Anchorage and Pacific/Honolulu) in calendar tools to handle DST transitions automatically.
- • When Alaska reverts to AKST in November, the offset to Hawaii shrinks to 1 hour — even tighter overlap.