HDT to SST Converter
HDT is not used on this date
This converter keeps HDT at UTC−9. Honolulu uses HST (UTC−10) on this date. Open the HST converter, or choose Honolulu, Pearl City, or Hilo for city-specific time.Start by searching for a time zone, city, or town.
Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
3:00 am03:00 HDT (UTC-9), Oct 23, 2026 = 1:00 am01:00 SST (UTC-11), Oct 23, 2026
HDT is 2 hours ahead of SST.
HDT and SST examples
These examples always use HDT (UTC-9) and SST (UTC-11). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
HDT is 2 hours ahead of SST.
How the time difference changes
HDT is 2 hours ahead of SST year-round.
Working hours of 9:00 am to 6:00 pm in HDT correspond to 7:00 am to 4:00 pm in SST.Working hours of 09:00 to 18:00 in HDT correspond to 07:00 to 16:00 in SST.
Compare HDT time with SST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Hawaii Daylight Time is 2 hours ahead of Samoa Standard Time.
3:00 am03:00 in HDT is 1:00 am01:00 in SST
HDT to SST call time
Best time for a conference call or a meeting is between 11am-6pm11:00-18:00 in HDT which corresponds to 9am-4pm09:00-16:00 in SST
3:00 am03:00 Hawaii Daylight Time (HDT). Offset UTC -9:00 hours
1:00 am01:00 Samoa Standard Time (SST). Offset UTC -11:00 hours
3:00 am03:00 HDT / 1:00 am01:00 SST
Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.
| HDT | SST |
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| 10:00pm previous day | |
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| 22:00 previous day | |
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Hawaii Daylight Time
Offset: HDT is 9 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: United States
Today all shaded areas are on HDT.
HDT representations, usage and related time zones
- -09 - basic short
- -0900 - basic
- -09:00 - extended
- -0900 - sign character (-) followed by a four digit time providing hours (09) and minutes (00) of the offset. Indicates an offset of nine hours to the west of the zero meridian.
- Victor - Military abbreviation for HDT
- V - short form of 'Victor'
- America/Adak
- America/Atka
- US/Aleutian
- AKST - Alaska Standard Time
- AHDT - Alaska-Hawaii Daylight Time
- HADT - Hawaii-Aleutian Daylight Time
- GAMT - Gambier Time
- HDT - Hawaii Daylight Time
- V - Victor Time Zone
Samoa Standard Time
Offset: SST is 11 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: American Samoa, United States Minor Outlying Islands
Principal Cities: The largest city in the SST time zone is Pago Pago in American Samoa, with about 11,500 people. Other major cities in this time zone include Tāfuna, Nu‘uuli, Leone, Faleniu.
Daylight Saving: Clocks in Samoa Standard Time (SST) do not change for daylight saving time, so SST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
SST representations, usage and related time zones
- -11 - basic short
- -1100 - basic
- -11:00 - extended
- -1100 - sign character (-) followed by a four digit time providing hours (11) and minutes (00) of the offset. Indicates an offset of eleven hours to the west of the zero meridian.
- X-ray - Military abbreviation for SST
- X - short form of 'X-ray'
- Pacific/Midway
- Pacific/Pago_Pago
- Pacific/Samoa
- US/Samoa
- NUT - Niue Time
- SST - Samoa Standard Time
- X - X-ray Time Zone