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AZOST
12am
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ET/EDT
UTC−4
4h behind
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Quick answers

Selected conversion

12:00 pm12:00 AZOST (UTC+0), Oct 18, 2026 = 8:00 am08:00 EDT (UTC-4), Oct 18, 2026

AZOST is 4 hours ahead of EDT.

How the time difference changes

For most of the year, AZOST is 4 hours ahead of ET. From Oct 25 to Nov 1, 2026, and from Mar 14 to Mar 28, 2027, AZOT is 3 hours ahead of ET. From Nov 1, 2026 to Mar 14, 2027, AZOT is 4 hours ahead of ET.

For most of the year, working hours of 9:00 am to 6:00 pm in AZOST correspond to 5:00 am to 2:00 pm in ET. At other times of the year, working hours of 9:00 am to 6:00 pm in AZOT correspond to 5:00 am to 2:00 pm in ET or working hours of 9:00 am to 6:00 pm in AZOT correspond to 6:00 am to 3:00 pm in ET.For most of the year, working hours of 09:00 to 18:00 in AZOST correspond to 05:00 to 14:00 in ET. At other times of the year, working hours of 09:00 to 18:00 in AZOT correspond to 05:00 to 14:00 in ET or working hours of 09:00 to 18:00 in AZOT correspond to 06:00 to 15:00 in ET.

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

Time Difference

Azores Summer Time is 4 hours ahead of Eastern Daylight Time.
12:00 pm12:00 in AZOST is 8:00 am08:00 in EDT

AZOST to EDT call time
Best time for a conference call or a meeting is between 1pm-6pm13:00-18:00 in AZOST which corresponds to 9am-2pm09:00-14:00 in EDT

12:00 pm12:00 Azores Summer Time (AZOST). Offset UTC 0:00 hours
8:00 am08:00 Eastern Daylight Time (EDT). Offset UTC -4:00 hours

12:00 pm12:00 AZOST / 8:00 am08:00 EDT

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Hourly time comparison
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Azores Summer Time

Offset: AZOST is the same as Greenwich Mean Time (GMT).

Countries using this time zone: Portugal

Principal Cities: The largest city in the AZOST time zone is Ponta Delgada in Portugal, with about 20,056 people. Other major cities in this time zone include Lagoa, Angra do Heroísmo, Rabo de Peixe, Horta.

Map of the areas on Azores Summer Time (AZOST)
AZOST part of the year

Today all shaded areas are on AZOST.

Daylight Saving: Azores Summer Time (AZOST) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Azores Time (AZOT).

123456789101112Start: Azores Summer Time (AZOST) started on Sunday, March 29, 2026 at 12:00 am00:00 local time and clocks were set one hour forward to Sunday, March 29, 2026, 1:00 am01:00. Daylight saving starts annually on the last Sunday of March.

123456789101112End: Azores Summer Time (AZOST) ends on Sunday, October 25, 2026 at 1:00 am01:00 local time and clocks are set one hour back to Sunday, October 25, 2026, 12:00 am00:00 local standard time instead. Daylight saving ends annually on the last Sunday of October.

See Portugal daylight saving time and upcoming clock changes worldwide.

AZOST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
  • +00 - basic short
  • +0000 - basic
  • +00:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates the zero UTC/GMT offset.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Zulu - Military abbreviation for AZOST
  • Z - short form of 'Zulu'
Time zones with the GMT +0 offset:
  • EGST - Eastern Greenland Summer Time
  • GMT - Greenwich Mean Time
  • WET - Western European Time
  • AZOST - Azores Summer Time
  • UTC - Coordinated Universal Time
  • WT - Western Sahara Standard Time
  • Z - Zulu Time Zone

Eastern Time

Eastern Time (ET) is a general term used to describe the areas that observe either the Eastern Standard Time (EST) or Eastern Daylight Time (EDT) in the United States and Canada. ET is not static but switches between EDT and EST.

ET is also used somewhat as a de facto official time for all of the United States because it encompasses 17 U.S. states in the eastern part of the contiguous United States including the capital city Washington D.C., the most populous city New York and half of the country’s population.

In the United States nationally televised programs, evening newscasts, talent and awards shows, and any other nationally televised event that airs live on American television during prime time and on the weekends are broadcast live in the Eastern Time Zone. Major professional sports leagues MLB, NBA, NFL and NHL also provide their game times in Eastern Time, even if teams are from outside of Eastern Time.

Countries using this time zone: Bahamas, Canada, Cayman Islands, Haiti, Jamaica, Mexico, Panama, Turks and Caicos Islands, United States

Principal Cities: The largest city in the ET time zone is New York City in the United States, with about 8.804 million people. Other major cities in this time zone include Toronto, Montréal, Philadelphia, Port-au-Prince.

French: HNE - Heure Normale de l'Est

Spanish: ET - Tiempo del Este, ET - Zona Sureste

Map of the areas on Eastern Time (ET)
ET all year ET part of the year

Today the lighter areas are on UTC−5 (Central Daylight Time, EST).

ET representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -05 - basic short
  • -0500 - basic
  • -05:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0500 - sign character (-) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates an offset of five hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Romeo - Military abbreviation for ET
  • R - short form of 'Romeo'
ET Abbreviation: Several time zones share ET abbreviation and it could refer to these time zones
  • Eastern Time - UTC -5
  • Tiempo del Este - UTC -5
Time zones with the GMT -5 offset:
  • CDT - Central Daylight Time
  • EST - Eastern Standard Time
  • ET - Eastern Time
  • COT - Colombia Time
  • CST - Cuba Standard Time
  • EASST - Easter Island Summer Time
  • ECT - Ecuador Time
  • PET - Peru Time
  • R - Romeo Time Zone