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MDT
Mountain Daylight Time
GMT -6
12am
3am
6am
9am
12pm
3pm
6pm
9pm
EASST
Easter Island Summer Time
GMT -5
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

6:00 am06:00 MDT (UTC-6), Oct 9, 2026 = 7:00 am07:00 EASST (UTC-5), Oct 9, 2026

MDT is 1 hour behind EASST.

MDT and EASST examples

These examples always use MDT (UTC-6) and EASST (UTC-5). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

MDT is 1 hour behind EASST.

How the time difference changes

Depending on seasonal clock changes, MDT and EAST have the same time, MDT is 1 hour behind EASST, or MST is 2 hours behind EASST.

Depending on seasonal clock changes, working hours of 9:00 am to 5:00 pm in MDT correspond to 9:00 am to 5:00 pm in EAST, working hours of 9:00 am to 5:00 pm in MDT correspond to 10:00 am to 6:00 pm in EASST, or working hours of 9:00 am to 5:00 pm in MST correspond to 11:00 am to 7:00 pm in EASST.Depending on seasonal clock changes, working hours of 09:00 to 17:00 in MDT correspond to 09:00 to 17:00 in EAST, working hours of 09:00 to 17:00 in MDT correspond to 10:00 to 18:00 in EASST, or working hours of 09:00 to 17:00 in MST correspond to 11:00 to 19:00 in EASST.

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

Time Difference

Mountain Daylight Time is 1 hour behind Easter Island Summer Time.
6:00 am06:00 in MDT is 7:00 am07:00 in EASST

MDT to EASST call time
Best time for a conference call or a meeting is between 9am-4pm09:00-16:00 in MDT which corresponds to 10am-5pm10:00-17:00 in EASST

6:00 am06:00 Mountain Daylight Time (MDT). Offset UTC -6:00 hours
7:00 am07:00 Easter Island Summer Time (EASST). Offset UTC -5:00 hours

6:00 am06:00 MDT / 7:00 am07:00 EASST

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

Mountain Daylight Time

Offset: MDT is 6 hours behind Greenwich Mean Time (GMT) and is used in North America

Countries using this time zone: Canada, Mexico, United States

Principal Cities: The largest city in the MDT time zone is Calgary in Canada, with about 1.307 million people. Other major cities in this time zone include Edmonton, Denver, El Paso, Albuquerque.

French: HAR - Heure Avancée des Rocheuses

Spanish: MT - Zona Pacífico

MDT Time Zone Geo Map
MDT timezone map

Daylight Saving: Mountain Daylight Time (MDT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Mountain Standard Time (MST).

Daylight saving time clock moves forward for one hourStart: Mountain Daylight Time (MDT) 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: Mountain Daylight Time (MDT) 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.

MDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -06 - basic short
  • -0600 - basic
  • -06:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0600 - sign character (-) followed by a four digit time providing hours (06) and minutes (00) of the offset. Indicates an offset of six hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Sierra - Military abbreviation for MDT
  • S - short form of 'Sierra'
IANA/Olson: Reflects MDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Boise
  • America/Cambridge_Bay
  • America/Ciudad_Juarez
  • America/Denver
  • America/Edmonton
  • America/Inuvik
  • America/Shiprock
  • America/Yellowknife
  • Canada/Mountain
  • MST7MDT
  • Navajo
  • US/Mountain
Time zones with the GMT -6 offset:
  • CST - Central Standard Time
  • CT - Central Time
  • MDT - Mountain Daylight Time
  • EAST - Easter Island Standard Time
  • GALT - Galapagos Time
  • S - Sierra Time Zone

Easter Island Summer Time

Offset: EASST is 5 hours behind Greenwich Mean Time (GMT) and is used in Pacific

Countries using this time zone: Chile

EASST Time Zone Geo Map
EASST timezone map

Daylight Saving: Easter Island Summer Time (EASST) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Easter Island Standard Time (EAST).

Daylight saving time clock moves forward for one hourStart: Easter Island Summer Time (EASST) started on Saturday, September 5, 2026 at 10:00 pm22:00 local time and clocks were set one hour forward to Saturday, September 5, 2026, 11:00 pm23:00. Daylight saving starts annually on the first Saturday of September.

End: Easter Island Summer Time (EASST) ends on Saturday, April 3, 2027 at 10:00 pm22:00 local time and clocks are set one hour back to Saturday, April 3, 2027, 9:00 pm21:00 local standard time instead. Daylight saving ends annually on the first Saturday of April.

See upcoming clock changes worldwide.

EASST 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 EASST
  • R - short form of 'Romeo'
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