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AMT/AMST

Amazon Time

UTC−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.

Keep AMST (UTC−3)

EDT/EST

Eastern Daylight Time

UTC−4

12am

3am

6am

9am

12pm

3pm

6pm

9pm

Eastern Time is on daylight saving time: EDT (UTC−4) until Sun, Nov 1.

Use EST all year (UTC−5)

Quick answers

Selected conversion

8:00 am08:00 AMT (UTC-4), Oct 12, 2026 = 8:00 am08:00 EDT (UTC-4), Oct 12, 2026

AMT and EDT have the same local time.

AMST and EST (US winter time, UTC-5) examples

These examples always use AMST (UTC-3) and EST (UTC-5). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

AMST is 2 hours ahead of EST.

EST is US Eastern winter time (early November to mid-March). The rest of the year New York uses EDT (UTC-4), one hour later. For Eastern Time that follows daylight saving time, use AMST to ET. For daylight-time examples, use AMT to EDT.

How the time difference changes

For most of the year, AMT and EDT have the same time. From Nov 1, 2026 to Mar 14, 2027, 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 EST 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

Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.

Hourly time comparison
AMT	EDT
	12:00am
	1:00am
	2:00am
	3:00am
	4:00am
	5:00am
	6:00am
	7:00am
	8:00am
	9:00am
	10:00am
	11:00am
	12:00pm
	1:00pm
	2:00pm
	3:00pm
	4:00pm
	5:00pm
	6:00pm
	7:00pm
	8:00pm
	9:00pm
	10:00pm
	11:00pm
	00:00
	01:00
	02:00
	03:00
	04:00
	05:00
	06:00
	07:00
	08:00
	09:00
	10:00
	11:00
	12:00
	13:00
	14:00
	15:00
	16:00
	17:00
	18:00
	19:00
	20:00
	21:00
	22:00
	23:00

Amazon Summer Time

Offset: AMST is 3 hours behind Greenwich Mean Time (GMT).

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 Standard Time

Offset: EST is 5 hours behind Greenwich Mean Time (GMT).

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

Principal Cities: The largest city in the EST 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 Standard Time (EST) — EST all year EST part of the year
Today the lighter areas are on UTC−4 (EDT).
Open the world time zone map © OpenStreetMap

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

End: Eastern Standard Time (EST) ended 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 local daylight time instead. Standard time ends annually on the second Sunday of March.

Start: Eastern Standard Time (EST) starts 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. Standard time starts annually on the first Sunday of November.

See upcoming clock changes worldwide.

EST representations, usage and related time zones