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HST/HADT
Hawaii Standard Time
GMT -10
12am
3am
6am
9am
12pm
3pm
6pm
9pm
HADT is not used on this date
This converter uses HST (GMT -10), the offset Adak uses on this date. Open the HST converter.
HNP
Heure Normale du Pacifique
GMT -8
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

The selected date and time will appear here when the converter loads.

HADT and HNP examples

These examples always use HADT (UTC-9) and HNP (UTC-8). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

HADT is 1 hour behind HNP.

How the time difference changes

For most of the year, HADT is 1 hour behind HNP. At other times of the year, HST is 2 hours behind HNP.

For most of the year, working hours of 9:00 am to 5:00 pm in HADT correspond to 10:00 am to 6:00 pm in HNP. At other times of the year, working hours of 9:00 am to 5:00 pm in HST correspond to 11:00 am to 7:00 pm in HNP.For most of the year, working hours of 09:00 to 17:00 in HADT correspond to 10:00 to 18:00 in HNP. At other times of the year, working hours of 09:00 to 17:00 in HST correspond to 11:00 to 19:00 in HNP.

Compare HADT time with HNP time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Hawaii Standard Time is 2 hours behind Heure Normale du Pacifique
2:00 am02:00 in HST is 4:00 am04:00 in HNP

HST to HNP call time
Best time for a conference call or a meeting is between 9am-3pm09:00-15:00 in HST which corresponds to 11am-5pm11:00-17:00 in HNP

2:00 am02:00 Hawaii Standard Time (HST). Offset UTC -10:00 hours
4:00 am04:00 Heure Normale du Pacifique (HNP). Offset UTC -8:00 hours

2:00 am02:00 HST / 4:00 am04:00 HNP

HSTHNP
12am (midnight)2am
1am3am
2am4am
3am5am
4am6am
5am7am
6am8am
7am9am
8am10am
9am11am
10am12pm (noon)
11am1pm
12pm (noon)2pm
1pm3pm
2pm4pm
3pm5pm
4pm6pm
5pm7pm
6pm8pm
7pm9pm
8pm10pm
9pm11pm
10pm12am (midnight)
11pm1am
00:0002:00
01:0003:00
02:0004:00
03:0005:00
04:0006:00
05:0007:00
06:0008:00
07:0009:00
08:0010:00
09:0011:00
10:0012:00
11:0013:00
12:0014:00
13:0015:00
14:0016:00
15:0017:00
16:0018:00
17:0019:00
18:0020:00
19:0021:00
20:0022:00
21:0023:00
22:0000:00
23:0001:00

Hawaii-Aleutian Daylight Time

Offset: HADT is 9 hours behind Greenwich Mean Time (GMT) and is used in North America

Daylight Saving: Hawaii-Aleutian Daylight Time (HADT) is a daylight saving/summer time zone, but some places set clocks back one hour during winter and observe Hawaii-Aleutian Standard Time (HAST).

Daylight saving time clock moves forward for one hourEnd: Hawaii-Aleutian Daylight Time (HADT) ended on Sunday, November 2, 2025 at 2:00 am02:00 local time and clocks were set one hour back to Sunday, November 2, 2025, 1:00 am01:00 local standard time instead. Daylight saving ends annually on the first Sunday of November

Daylight saving time clock moves back for one hourStart: Hawaii-Aleutian Daylight Time (HADT) starts on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 8, 2026, 3:00 am03:00. Daylight saving starts annually on the second Sunday of March

See upcoming clock changes worldwide.

HADT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -09 - basic short
  • -0900 - basic
  • -09:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -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.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Victor - Military abbreviation for HADT
  • V - short form of 'Victor'
Time zones with the GMT -9 offset:
  • 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

Heure Normale du Pacifique

Offset: HNP is 8 hours behind Greenwich Mean Time (GMT) and is used in America

Countries using this time zone: Canada, Mexico, United States

Principal Cities: The largest city in the HNP time zone is Los Angeles in the United States, with about 3.821 million people. Other major cities in this time zone include Tijuana, San Diego, Mexicali, San Jose.

Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Pacific Daylight Time (PDT).

Daylight saving time clock moves back for one hourStart: Heure Normale du Pacifique (HNP) started on Sunday, November 2, 2025 at 2:00 am02:00 local time and clocks were set one hour back to Sunday, November 2, 2025, 1:00 am01:00. Standard time starts annually on the first Sunday of November.

Daylight saving time clock moves forward for one hourEnd: Heure Normale du Pacifique (HNP) ends on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 8, 2026, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.

See upcoming clock changes worldwide.

HNP representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -08 - basic short
  • -0800 - basic
  • -08:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0800 - sign character (-) followed by a four digit time providing hours (08) and minutes (00) of the offset. Indicates an offset of eight hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Uniform - Military abbreviation for HNP
  • U - short form of 'Uniform'
Time zones with the GMT -8 offset:
  • AKDT - Alaska Daylight Time
  • PST - Pacific Standard Time
  • PT - Pacific Time
  • PST - Pitcairn Standard Time
  • U - Uniform Time Zone