AKST to AKDT Converter
Convert time between Alaska Standard Time (AKST) and Alaska Daylight Time (AKDT)
Alaska Standard Time (AKST)
Alaska Daylight Time (AKDT)
Time Difference
Alaska Daylight Time (AKDT) is 0 hours ahead of Alaska Standard Time (AKST)
Select Date
Select Time
Quick Reference
| AKST | AKDT |
|---|---|
| 18:00 | 18:00 |
| 20:00 | 20:00 |
| 22:00 | 22:00 |
| 00:00 | 00:00 |
| 02:00 | 02:00 |
| 04:00 | 04:00 |
| 06:00 | 06:00 |
| 08:00 | 08:00 |
| 10:00 | 10:00 |
| 12:00 | 12:00 |
| 14:00 | 14:00 |
| 16:00 | 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 AKST to AKDT Time Conversion
Converting time between Alaska Standard Time (AKST) and Alaska Daylight Time (AKDT) is a same-region conversion: both apply to most of Alaska, just at different times of year. AKST is UTC-9 (used the rest of the year), while AKDT is UTC-8 (used from the second Sunday in March to the first Sunday in November). AKDT is 1 hour ahead of AKST.
This converter is most useful for understanding the DST transition itself, scheduling events that span the changeover dates, or comparing winter and summer schedules in Alaska. In practice, only one of AKST or AKDT is in effect at any given moment in Alaska — they are not observed simultaneously. The converter treats them as if both were active for hypothetical scheduling and DST planning purposes.
Common Use Cases for AKST to AKDT Conversion
Business & Work
- Comparing winter (AKST) and summer (AKDT) operating hours in Alaska
- Planning DST transition cutovers for Alaska-based teams
- Scheduling recurring events that span the spring-forward or fall-back transitions
Personal & Travel
- Understanding when DST begins and ends in Alaska
- Planning travel and remembering which offset applies in a given month
- Coordinating with Alaska-based contacts whose local clock changes seasonally
Time Zone Information
Alaska Standard Time (AKST)
- UTC Offset: UTC-9
- IANA Timezone: America/Anchorage
- Daylight Saving: First Sunday in November to Second Sunday in March (winter standard time)
- Major Cities: Anchorage, Fairbanks, Juneau, Sitka
- Coverage: Most of Alaska outside 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: AKST to AKDT
Remember: AKDT is always 1 hour ahead of AKST. In practice only one is active at a time in Alaska.
Frequently Asked Questions
What is the time difference between AKST and AKDT?
Alaska Standard Time (AKST) is UTC-9, while Alaska Daylight Time (AKDT) is UTC-8. AKDT is 1 hour ahead of AKST. When the clock reads 12:00 PM AKST, the same physical moment in AKDT notation would be 1:00 PM.
When does each timezone apply in Alaska?
AKST applies from the first Sunday in November to the second Sunday in March (winter standard time). AKDT applies from the second Sunday in March to the first Sunday in November (the daylight saving period). Only one is in effect at any given moment.
Are AKST and AKDT observed at the same time?
No. They are the same timezone (America/Anchorage) at different times of the year. The state shifts forward to AKDT in spring and back to AKST in fall. This converter is useful for comparing winter and summer schedules or planning DST transitions.
When does Alaska switch between AKST and AKDT?
Alaska springs forward to AKDT on the second Sunday of March (clocks jump from 2:00 AM to 3:00 AM) and falls back to AKST on the first Sunday of November (clocks roll back from 2:00 AM to 1:00 AM).
Which cities use AKST and AKDT?
Both apply to most of Alaska, including Anchorage, Fairbanks, Juneau, Sitka, and Ketchikan. AKST in winter, AKDT in summer. The Aleutian Islands use Hawaii-Aleutian Time (HAST/HADT) instead.
How do I plan recurring meetings across the AKST-AKDT switch?
Use the IANA timezone America/Anchorage in calendar tools. The system will automatically apply AKST or AKDT based on the date, keeping your meetings at the same local time year-round.
Pro Tips
- • AKDT is 1 hour ahead of AKST — add 1 hour to an AKST time to express it as AKDT notation.
- • AKST and AKDT never coexist. Alaska uses AKST November-March and AKDT the rest of the year.
- • For recurring events, always use America/Anchorage as the IANA identifier so DST transitions handle themselves.
- • During the spring-forward transition, the hour from 2:00–3:00 AM AKST does not exist locally. Plan around it.
- • During the fall-back transition, the hour from 1:00–2:00 AM AKDT happens twice (once as AKDT, once as AKST). Be explicit when scheduling.
- • When converting fixed offsets (e.g., AKST 4 PM to AKDT 4 PM), remember they refer to different physical moments in the year.