HAST
Hawaii-Aleutian Standard Time
GMT -10
EST/EDT
Eastern Standard Time
GMT -5
EDT automatically adjusted to EST time zone, that is in use

Time Difference

Hawaii-Aleutian Standard Time is 5 hours behind Eastern Standard Time
4:30 am04:30 in HAST is 9:30 am09:30 in EST

HAST to EDT call time
Best time for a conference call or a meeting is between 8am-12pm in HAST which corresponds to 2pm-6pm in EDT

4:30 am04:30 Hawaii-Aleutian Standard Time (HAST). Offset UTC -10:00 hours
9:30 am09:30 Eastern Standard Time (EST). Offset UTC -5:00 hours

4:30 am04:30 HAST / 9:30 am09:30 EST

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

Hawaii-Aleutian Standard Time

Offset: HAST is 10 hours behind Greenwich Mean Time (GMT) and is used in North America

HAST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -10 - basic short
  • -1000 - basic
  • -10:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -1000 - sign character (-) followed by a four digit time providing hours (10) and minutes (00) of the offset. Indicates ten 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
  • Whiskey - Military abbreviation for HAST
  • W - short form of 'Whiskey'
Time zones with the GMT -10 offset:
  • HAST - Hawaii-Aleutian Standard Time
  • CKT - Cook Island Time
  • HST - Hawaii Standard Time
  • TAHT - Tahiti Time
  • W - Whiskey Time Zone

Eastern Daylight Time

Offset: EDT is 4 hours behind Greenwich Mean Time (GMT) and is used in North America

Countries: It is used in following countries: Bahamas, Canada, Haiti, Turks & Caicos Is, United States

Principal Cities: The largest city in the EDT timezone is New York City from USA with population about 8.175 million people. Other major cities in the area are Toronto, Montreal, Brooklyn, Borough of Queens

French: HAE - Heure Avancée de l'Est

Spanish: EDT - Tiempo de verano del Este, ET - Zona Sureste

EDT Time Zone Geo Map
EDT timezone map

Daylight Saving: Eastern Daylight Time (EDT) is a daylight saving/summer time zone, however during winter some places adjust time for one hour back and observe Eastern Standard Time (EST).

Daylight saving time clock moves back for one hour from 2am to 1amEnd: Eastern Daylight Time (EDT) has ended on Sunday, November 7, 2021 at 2:00 am local time and clocks were set one hour back to Sunday, November 7, 2021, 1:00 am local standard time instead. Daylight saving ends annually the on first Sunday of November

Daylight saving time clock moves forward for one hour from 2am to 3amStart: Eastern Daylight Time (EDT) starts on Sunday, March 13, 2022 at 2:00 am local time and clocks are set one hour forward to Sunday, March 13, 2022, 3:00 am. Daylight saving starts annually the on second Sunday of March

EDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -04 - basic short
  • -0400 - basic
  • -04:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0400 - sign character (-) followed by a four digit time providing hours (04) and minutes (00) of the offset. Indicates four 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
  • Quebec - Military abbreviation for EDT
  • Q - short form of 'Quebec'
IANA/Olson: Reflects EDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Detroit
  • America/Fort_Wayne
  • America/Grand_Turk
  • America/Indiana/Indianapolis
  • America/Indiana/Marengo
  • America/Indiana/Petersburg
  • America/Indiana/Vevay
  • America/Indiana/Vincennes
  • America/Indiana/Winamac
  • America/Indianapolis
  • America/Iqaluit
  • America/Kentucky/Louisville
  • America/Kentucky/Monticello
  • America/Louisville
  • America/Montreal
  • America/Nassau
  • America/New_York
  • America/Nipigon
  • America/Pangnirtung
  • America/Port-au-Prince
  • America/Thunder_Bay
  • America/Toronto
  • Canada/Eastern
  • EST5EDT
  • US/East-Indiana
  • US/Eastern
  • US/Michigan
Time zones with the GMT -4 offset:
  • AST - Atlantic Standard Time
  • EDT - Eastern Daylight Time
  • AMT - Amazon Time
  • BOT - Bolivia Time
  • CDT - Cuba Daylight Time
  • CLT - Chile Standard Time
  • FKT - Falkland Island Time
  • GYT - Guyana Time
  • HLV - Hora Legal de Venezuela
  • PYT - Paraguay Time
  • Q - Quebec Time Zone
  • VET - Venezuelan Standard Time