MDT Time Converter

Convert Mountain Daylight Time (UTC-6) to any timezone worldwide

Mountain Daylight Time (MDT)

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EDT

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CDT

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PDT

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London

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UTC

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Popular MDT Time Conversions

Timezone	Offset from MDT	Example (12:00 PM MDT)
Eastern Daylight Time (EDT)	+2 hours	2:00 PM EDT
Central Daylight Time (CDT)	+1 hour	1:00 PM CDT
Pacific Daylight Time (PDT)	-1 hour	11:00 AM PDT
Alaska Daylight Time (AKDT)	-2 hours	10:00 AM AKDT
Hawaii-Aleutian Standard Time (HST)	-4 hours	8:00 AM HST
Greenwich Mean Time (GMT)	+6 hours	6:00 PM GMT
Central European Summer Time (CEST)	+8 hours	8:00 PM CEST
India Standard Time (IST)	+11.5 hours	11:30 PM IST
China Standard Time (CST)	+14 hours	2:00 AM CST (next day)
Japan Standard Time (JST)	+15 hours	3:00 AM JST (next day)
Australian Eastern Daylight Time (AEDT)	+17 hours	5:00 AM AEDT (next day)

About Mountain Daylight Time (MDT)

Mountain Daylight Time (MDT) is a daylight saving time zone used in North America during the summer months. It is 6 hours behind Coordinated Universal Time (UTC-6) and applies to regions in the Mountain Time Zone when daylight saving time is active.

Key Facts About MDT

UTC Offset

MDT is UTC-6, meaning it is 6 hours behind Coordinated Universal Time.

Active Period

MDT begins on the second Sunday of March at 2:00 AM local time, when clocks spring forward one hour. It ends on the first Sunday of November at 2:00 AM local time, when clocks fall back to Mountain Standard Time (MST, UTC-7).

Geographic Coverage

MDT is observed in parts of Canada (Alberta, British Columbia, Northwest Territories), the United States (Colorado, Montana, New Mexico, Wyoming, parts of Idaho, Oregon, and others), and Mexico (Chihuahua, Sonora border areas).

Major Cities in MDT Zone

Denver, CO

Calgary, AB

Edmonton, AB

Phoenix, AZ*

Albuquerque, NM

El Paso, TX

Boise, ID

Salt Lake City, UT

*Phoenix observes MST year-round and does not switch to MDT

How to Convert MDT to Other Time Zones

Step-by-Step Conversion Process

Example 1: MDT to EDT

Step 1: Identify your MDT time (e.g., 3:00 PM MDT)

Step 2: Determine the offset between MDT (UTC-6) and EDT (UTC-4)

Step 3: EDT is 2 hours ahead of MDT, so add 2 hours

Step 4: Result: 3:00 PM MDT = 5:00 PM EDT

Example 2: MDT to GMT/UTC

Step 1: Start with your MDT time (e.g., 10:00 AM MDT)

Step 2: MDT is UTC-6, meaning 6 hours behind UTC

Step 3: Add 6 hours to convert to UTC

Step 4: Result: 10:00 AM MDT = 4:00 PM UTC

Example 3: MDT to JST

Step 1: Begin with your MDT time (e.g., 9:00 PM MDT)

Step 2: Calculate offset: JST (UTC+9) – MDT (UTC-6) = 15 hours

Step 3: Add 15 hours to MDT time

Step 4: Result: 9:00 PM MDT = 12:00 PM JST (next day)

MDT to Other Time Zones Reference

This reference table shows how to quickly convert MDT to commonly used time zones around the world.

Time Zone	Abbreviation	UTC Offset	Offset from MDT
Hawaii-Aleutian Standard Time	HST	UTC-10	-4 hours
Alaska Daylight Time	AKDT	UTC-8	-2 hours
Pacific Daylight Time	PDT	UTC-7	-1 hour
Mountain Standard Time	MST	UTC-7	-1 hour
Central Daylight Time	CDT	UTC-5	+1 hour
Eastern Daylight Time	EDT	UTC-4	+2 hours
Atlantic Daylight Time	ADT	UTC-3	+3 hours
Coordinated Universal Time	UTC	UTC+0	+6 hours
British Summer Time	BST	UTC+1	+7 hours
Central European Summer Time	CEST	UTC+2	+8 hours
Eastern European Summer Time	EEST	UTC+3	+9 hours
Gulf Standard Time	GST	UTC+4	+10 hours
India Standard Time	IST	UTC+5:30	+11:30 hours
China Standard Time	CST	UTC+8	+14 hours
Japan Standard Time	JST	UTC+9	+15 hours
Australian Eastern Standard Time	AEST	UTC+10	+16 hours
New Zealand Daylight Time	NZDT	UTC+13	+19 hours

Frequently Asked Questions

What is Mountain Daylight Time?

Mountain Daylight Time (MDT) is the daylight saving time zone for the Mountain Time Zone in North America. It is observed during the warmer months when clocks are set one hour ahead of Mountain Standard Time (MST). MDT is 6 hours behind UTC (UTC-6).

When does MDT start and end?

MDT begins on the second Sunday in March at 2:00 AM, when clocks spring forward one hour from MST. It ends on the first Sunday in November at 2:00 AM, when clocks fall back one hour to MST. For 2026, MDT starts on March 8 and ends on November 1.

What is the difference between MDT and MST?

The difference between MDT and MST is one hour. Mountain Daylight Time (MDT) is UTC-6, while Mountain Standard Time (MST) is UTC-7. MDT is used during daylight saving time in the summer months, while MST is used during the winter months. Some areas, like Arizona (except the Navajo Nation), use MST year-round and do not observe MDT.

How many hours is MDT behind EST or EDT?

MDT is 2 hours behind EDT (Eastern Daylight Time). When it’s 12:00 PM MDT, it’s 2:00 PM EDT. During winter months when EST (Eastern Standard Time) is observed, MST (not MDT) is also 2 hours behind EST.

Which states observe MDT?

States that observe MDT include Colorado, Montana, New Mexico, Utah, and Wyoming (entirely), as well as parts of Idaho, Kansas, Nebraska, Nevada, North Dakota, Oregon, South Dakota, and Texas. Arizona does not observe MDT and stays on MST year-round, except for the Navajo Nation which does observe daylight saving time.

How do I convert MDT to my local time?

To convert MDT to your local time, first determine your timezone’s UTC offset. Then calculate the time difference between your timezone and MDT (UTC-6). Add or subtract the difference from the MDT time. For example, if you’re in EDT (UTC-4), add 2 hours to MDT. If you’re in PDT (UTC-7), subtract 1 hour from MDT. You can also use the converter above for instant results.

Is Denver on MDT or MST?

Denver observes both time zones depending on the season. From the second Sunday in March through the first Sunday in November, Denver follows Mountain Daylight Time (MDT, UTC-6). During the rest of the year, Denver follows Mountain Standard Time (MST, UTC-7).

What does UTC-6 mean?

UTC-6 means the time zone is 6 hours behind Coordinated Universal Time (UTC). When it’s 12:00 PM (noon) UTC, it’s 6:00 AM in the UTC-6 timezone. MDT operates at UTC-6 during daylight saving time months.

Can I schedule meetings across MDT and other time zones?

Yes, you can schedule meetings across time zones using this converter. Simply input your desired MDT time and convert it to the other participants’ time zones. Consider using tools that display multiple time zones simultaneously to find a suitable meeting time for all participants. Remember to account for daylight saving time transitions in different regions.

Why doesn’t Arizona observe MDT?

Arizona (except the Navajo Nation) does not observe daylight saving time and remains on Mountain Standard Time (MST, UTC-7) year-round. This decision was made because the state receives abundant sunshine year-round, and shifting clocks would result in more hot afternoon daylight hours during summer, potentially increasing energy consumption for cooling.