HST to EAT Converter & Meeting Planner
Quick answer: 9:00 AM HST = 10:00 PM EAT (fixed -10:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Hawaii-Aleutian Standard Time (HST) and Eastern Africa Time (EAT)? You need to account for the standard time difference. Eastern Africa Time is normally 13 hours ahead of Hawaii-Aleutian Standard Time. Whether you are coordinating between teams in Honolulu and Hilo and Nairobi and Addis Ababa, our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM HST = 1:00 PM EAT. The full 24-hour HST to EAT table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM HST = 4:00 AM EAT (+1 day).
| HST Time | EAT Time |
|---|---|
| 12:00 AM (00:00) | 1:00 PM (13:00) |
| 1:00 AM (01:00) | 2:00 PM (14:00) |
| 2:00 AM (02:00) | 3:00 PM (15:00) |
| 3:00 AM (03:00) | 4:00 PM (16:00) |
| 4:00 AM (04:00) | 5:00 PM (17:00) |
| 5:00 AM (05:00) | 6:00 PM (18:00) |
| 6:00 AM (06:00) | 7:00 PM (19:00) |
| 7:00 AM (07:00) | 8:00 PM (20:00) |
| 8:00 AM (08:00) | 9:00 PM (21:00) |
| 9:00 AM (09:00) | 10:00 PM (22:00) |
| 10:00 AM (10:00) | 11:00 PM (23:00) |
| 11:00 AM (11:00) | 12:00 AM (00:00)+1 day |
| 12:00 PM (12:00) | 1:00 AM (01:00)+1 day |
| 1:00 PM (13:00) | 2:00 AM (02:00)+1 day |
| 2:00 PM (14:00) | 3:00 AM (03:00)+1 day |
| 3:00 PM (15:00) | 4:00 AM (04:00)+1 day |
| 4:00 PM (16:00) | 5:00 AM (05:00)+1 day |
| 5:00 PM (17:00) | 6:00 AM (06:00)+1 day |
| 6:00 PM (18:00) | 7:00 AM (07:00)+1 day |
| 7:00 PM (19:00) | 8:00 AM (08:00)+1 day |
| 8:00 PM (20:00) | 9:00 AM (09:00)+1 day |
| 9:00 PM (21:00) | 10:00 AM (10:00)+1 day |
| 10:00 PM (22:00) | 11:00 AM (11:00)+1 day |
| 11:00 PM (23:00) | 12:00 PM (12:00)+1 day |
Best time to call Nairobi from Honolulu
For most work calls, compare the normal business day in Honolulu (HST) with the business day in Nairobi (EAT). HST commonly covers Pacific Ocean, North America, while EAT is mainly associated with Eastern Africa, Indian Ocean.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
⚠️ There is no clean same-day business-hours overlap on 2026-07-05. A practical compromise is around 7:00 PM HST, which reaches 8:00 AM EAT near the start of their workday.
- DST Safety: HST or EAT may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
- Nairobi Securities Exchange (NSE): 09:00-15:00 local time in Nairobi.
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Frequently Asked Questions
What is the time difference between HST and EAT?
During standard time, Eastern Africa Time is 13 hours ahead of Hawaii-Aleutian Standard Time.
Does Hawaii observe Daylight Saving Time?
Hawaii does not observe Daylight Saving Time and has not done so since 1947, remaining fixed at UTC-10:00 year-round. At roughly 20° North latitude, Hawaii's daylight hours vary by only about 1.5 hours between the summer and winter solstices — far too little to justify the disruption of a seasonal clock change.
Why is it called Hawaii-Aleutian time?
The name combines two geographically distant US territories that share the same UTC-10:00 standard offset: the Hawaiian Islands in the central Pacific and the westernmost Aleutian Islands of Alaska, which extend past the 180° meridian into the Eastern Hemisphere. Despite sharing a base offset, they behave differently — Hawaii observes no DST, while the Aleutian communities such as Adak do advance to HDT (UTC-9) each summer.
Do East African countries observe Daylight Saving Time?
None of the countries observing Eastern Africa Time use Daylight Saving Time. Situated close to the equator, these nations experience minimal seasonal variation in daylight hours, making clock changes unnecessary — EAT remains permanently fixed at UTC+03:00 throughout the year.
Which major countries use Eastern Africa Time (EAT)?
Eastern Africa Time is observed by Kenya, Ethiopia, Tanzania, Uganda, Madagascar, Somalia, and Djibouti. Among these, Kenya and Ethiopia are the zone's two largest economies, with Nairobi and Addis Ababa serving as the primary financial and administrative centers.