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AMT/AMST
Amazon Time
GMT -4
12am
3am
6am
9am
12pm
3pm
6pm
9pm
AMST is not used on this date.

This converter uses AMT (UTC−4), as in Cuiaba.

EDT
Eastern Daylight Time
GMT -4
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

8:00 am08:00 AMT (UTC-4), Oct 9, 2026 = 8:00 am08:00 EDT (UTC-4), Oct 9, 2026

AMT and EDT have the same local time.

AMST and EDT examples

These examples always use AMST (UTC-3) and EDT (UTC-4). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

AMST is 1 hour ahead of EDT.

How the time difference changes

For most of the year, AMT and EDT have the same time. At other times of the year, AMT is 1 hour ahead of EST.

For most of the year, working hours of 9:00 am to 5:00 pm in AMT correspond to 9:00 am to 5:00 pm in EDT. At other times of the year, working hours of 9:00 am to 5:00 pm in AMT correspond to 8:00 am to 4:00 pm in EST.For most of the year, working hours of 09:00 to 17:00 in AMT correspond to 09:00 to 17:00 in EDT. At other times of the year, working hours of 09:00 to 17:00 in AMT correspond to 08:00 to 16:00 in EST.

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

Time Difference

Amazon Time and Eastern Daylight Time have the same local time.
8:00 am08:00 in AMT is 8:00 am08:00 in EDT

AMT to EDT call time
Best time for a conference call or a meeting is between 9am-5pm09:00-17:00 in AMT which corresponds to 9am-5pm09:00-17:00 in EDT

8:00 am08:00 Amazon Time (AMT). Offset UTC -4:00 hours
8:00 am08:00 Eastern Daylight Time (EDT). Offset UTC -4:00 hours

8:00 am08:00 AMT / 8:00 am08:00 EDT

AMTEDT
12:00am12:00am
1:00am1:00am
2:00am2:00am
3:00am3:00am
4:00am4:00am
5:00am5:00am
6:00am6:00am
7:00am7:00am
8:00am8:00am
9:00am9:00am
10:00am10:00am
11:00am11:00am
12:00pm12:00pm
1:00pm1:00pm
2:00pm2:00pm
3:00pm3:00pm
4:00pm4:00pm
5:00pm5:00pm
6:00pm6:00pm
7:00pm7:00pm
8:00pm8:00pm
9:00pm9:00pm
10:00pm10:00pm
11:00pm11:00pm
00:0000:00
01:0001:00
02:0002:00
03:0003:00
04:0004:00
05:0005:00
06:0006:00
07:0007:00
08:0008:00
09:0009:00
10:0010:00
11:0011:00
12:0012:00
13:0013:00
14:0014:00
15:0015:00
16:0016:00
17:0017:00
18:0018:00
19:0019:00
20:0020:00
21:0021:00
22:0022:00
23:0023:00

Amazon Summer Time

Offset: AMST is 3 hours behind Greenwich Mean Time (GMT) and is used in South America

AMST Time Zone Geo Map
AMST timezone map

AMST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -03 - basic short
  • -0300 - basic
  • -03:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0300 - sign character (-) followed by a four digit time providing hours (03) and minutes (00) of the offset. Indicates an offset of three hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Papa - Military abbreviation for AMST
  • P - short form of 'Papa'
AMST Abbreviation: Several time zones share AMST abbreviation and it could refer to these time zones
  • Armenia Summer Time - UTC +5
  • Amazon Summer Time - UTC -3
Time zones with the GMT -3 offset:
  • ADT - Atlantic Daylight Time
  • PMT - Pierre & Miquelon Standard Time
  • PMST - Pierre & Miquelon Standard Time
  • AMST - Amazon Summer Time
  • ART - Argentina Time
  • BRT - Brasília time
  • CLST - Chile Summer Time
  • FKST - Falkland Islands Summer Time
  • GFT - French Guiana Time
  • P - Papa Time Zone
  • PYST - Paraguay Summer Time
  • SRT - Suriname Time
  • UYT - Uruguay Time

Eastern Daylight Time

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

Countries using this time zone: Bahamas, Canada, Haiti, Turks & Caicos Is, United States

Principal Cities: The largest city in the EDT 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, Brooklyn, Borough of Queens, Montreal.

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. During winter, some places set clocks back one hour and observe Eastern Standard Time (EST).

Daylight saving time clock moves forward for one hourStart: Eastern Daylight Time (EDT) started on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 3:00 am03:00. Daylight saving starts annually on the second Sunday of March.

Daylight saving time clock moves back for one hourEnd: Eastern Daylight Time (EDT) ends on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 1:00 am01:00 local standard time instead. Daylight saving ends annually on the first Sunday of November.

See upcoming clock changes worldwide.

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 an offset of four hours 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