HST/HDT
Hawaii Standard Time
GMT -10
HDT automatically adjusted to HST time zone, that is in use
ADT
Apia Daylight Time
GMT +14

Time Difference

Hawaii Standard Time is 24 hours behind Apia Daylight Time
10:30 am10:30 in HST is 10:30 am10:30 in ADT

HDT to ADT call time
Best time for a conference call or a meeting is between 1:30am-3:30am in HDT which corresponds to 12:30pm-2:30pm in ADT

10:30 am10:30 Hawaii Standard Time (HST). Offset UTC -10:00 hours
10:30 am10:30 Apia Daylight Time (ADT). Offset UTC +14:00 hours

10:30 am10:30 HST / 10:30 am10:30 ADT

HST ADT
12am (midnight) 12am (midnight)
1am 1am
2am 2am
3am 3am
4am 4am
5am 5am
6am 6am
7am 7am
8am 8am
9am 9am
10am 10am
11am 11am
12pm (noon) 12pm (noon)
1pm 1pm
2pm 2pm
3pm 3pm
4pm 4pm
5pm 5pm
6pm 6pm
7pm 7pm
8pm 8pm
9pm 9pm
10pm 10pm
11pm 11pm
0:00 0:00
1:00 1:00
2:00 2:00
3:00 3:00
4:00 4:00
5:00 5:00
6:00 6:00
7:00 7:00
8:00 8:00
9:00 9:00
10:00 10:00
11:00 11:00
12:00 12:00
13:00 13:00
14:00 14:00
15:00 15:00
16:00 16:00
17:00 17:00
18:00 18:00
19:00 19:00
20:00 20:00
21:00 21:00
22:00 22:00
23:00 23:00

Hawaii Daylight Time

Offset: HDT is 9 hours behind Greenwich Mean Time (GMT) and is used in Pacific

Countries: It is used in following countries: United States

HDT 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 nine hour and zero minutes time differences to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Victor - Military abbreviation for HDT
  • V - short form of 'Victor'
IANA/Olson: Reflects HDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Adak
  • America/Atka
  • US/Aleutian
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

Apia Daylight Time

Offset: ADT is 14 hours ahead Greenwich Mean Time (GMT) and is used in Pacific

ADT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +14 - basic short
  • +1400 - basic
  • +14:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +1400 - sign character (+) followed by a four digit time providing hours (14) and minutes (00) of the offset. Indicates fourteen hour and zero minutes time differences to the east of the zero meridian.
ADT Abbreviation: Several time zones share ADT abbreviation and it could refer to these time zones
  • Atlantic Daylight Time - UTC -3
  • Apia Daylight Time - UTC +14
  • Arabian Daylight Time - UTC +4
Time zones with the GMT +14 offset:
  • LINT - Line Islands Time
  • WSDT - West Samoa Daylight Time