AMST to UTC Converter

Updating current time…
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)
UTC
Coordinated Universal Time
UTC+0
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

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

AMT is 4 hours behind UTC.

AMST and UTC examples

These examples always use AMST (UTC-3) and UTC (UTC+0). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

AMST is 3 hours behind UTC.

How the time difference changes

AMT is 4 hours behind UTC year-round.

Working hours of 9:00 am to 5:00 pm in AMT correspond to 1:00 pm to 9:00 pm in UTC.Working hours of 09:00 to 17:00 in AMT correspond to 13:00 to 21:00 in UTC.

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

Time Difference

Amazon Time is 4 hours behind Coordinated Universal Time.
8:00 am08:00 in AMT is 12:00 pm12:00 in UTC

AMT to UTC call time
Best time for a conference call or a meeting is between 9am-1pm09:00-13:00 in AMT which corresponds to 1pm-5pm13:00-17:00 in UTC

8:00 am08:00 Amazon Time (AMT). Offset UTC -4:00 hours
12:00 pm12:00 Coordinated Universal Time (UTC). Offset UTC 0:00 hours

8:00 am08:00 AMT / 12:00 pm12:00 UTC

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
AMTUTC
4:00am
5:00am
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7:00am
8:00am
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12:00pm
1:00pm
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5:00pm
6:00pm
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8:00pm
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11:00pm
12:00am next day
1:00am next day
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04:00
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22:00
23:00
00:00 next day
01:00 next day
02:00 next day
03:00 next day

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

Coordinated Universal Time

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

Coordinated Universal Time (UTC) is the world time standard that regulates clocks and time. It is the successor to Greenwich Mean Time (GMT). For casual use, UTC is the same as GMT, but UTC is the standard the scientific community uses.
UTC has been the time standard commonly used across the world since 1972. It is used in many technical fields, such as aviation and meteorology, and to synchronize time across internet networks.

Map of the areas on Coordinated Universal Time (UTC)
UTC all year UTC part of the year

Today some of the lighter areas are on UTC+1 (British Summer Time, Irish Standard Time, WEST).

Open the world time zone map© OpenStreetMap

UTC 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 UTC
  • Z - short form of 'Zulu'
IANA/Olson: Reflects UTC time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Etc/UCT
  • Etc/UTC
  • Etc/Universal
  • Etc/Zulu
  • UCT
  • UTC
  • Universal
  • 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
EST to ISTGMT to ESTPST to ESTEST to GMTPST to GMT