Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

MDT to EDT

+2h

MDT

MDTSOURCE

UTC-06:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

EDT

UTC-04:00☀ DST active

HH02

MM00

14:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

MDT

EDT

12:00 AM

2:00 AM

4:00 AM

6:00 AM

8:00 AM

10:00 AM

12:00 PM

2:00 PM

4:00 PM

6:00 PM

8:00 PM

10:00 PM

12:00 AM+1

Green rows indicate typical business hours (9 AM - 5 PM)

MDT and EDT on the World Map

The map below highlights the MDT (Mountain Daylight Time) and EDT (Eastern Daylight Time) timezone regions across the globe.

MDT Zone

→

EDT Zone

Explore all world timezones interactively →

MDT – Mountain Daylight Time

UTC-06:00

Mountain Daylight Time (MDT) is the daylight saving offset in the Mountain Time Zone, 6 hours behind UTC.

Countries in MDT

United States (Mountain)Canada (Alberta)

Major Cities in MDT

DenverCalgaryEdmontonSalt Lake CityBoise

Key Facts about MDT

•MDT shares the same offset as CST (UTC-06:00).
•Arizona does not switch to MDT, remaining on MST.

Daylight Saving:Yes – switches to MST

Learn more about MDT on Wikipedia

EDT – Eastern Daylight Time

UTC-04:00

Eastern Daylight Time (EDT) is the daylight saving time observed in the Eastern Time Zone, 4 hours behind UTC.

Countries in EDT

United States (Eastern)Canada (Ontario, Quebec)BahamasHaitiTurks and Caicos

Major Cities in EDT

New York CityWashington D.C.TorontoMiamiPhiladelphiaAtlantaBostonMontreal

Key Facts about EDT

•EDT is observed from the second Sunday of March to the first Sunday of November.
•During EDT, the US East Coast is only 4 hours behind London (instead of 5).
•Not all EST locations switch to EDT – Panama and Jamaica stay on EST year-round.

Daylight Saving:Yes – switches to EST

Learn more about EDT on Wikipedia

MDT vs EDT: Offsets, DST and Best Call Times

MDT runs on Mountain Daylight Time (MDT) at UTC-06:00. EDT runs on Eastern Daylight Time (EDT) at UTC-04:00. That puts MDT 2 hours ahead of EDT — a difference of +2h at the current offsets.

In practice, when it is 9:00 AM in MDT it is 11:00 AM in EDT. Midnight in MDT is 2:00 AM in EDT. Neither zone observes daylight saving time, so the offset between them stays constant all year.

MDT to EDT time conversion table

MDT (MDT)	EDT (EDT)	Day
12:00 AM	2:00 AM	same day
6:00 AM	8:00 AM	same day
7:00 AM	9:00 AM	same day
8:00 AM	10:00 AM	same day
9:00 AM	11:00 AM	same day
12:00 PM	2:00 PM	same day
3:00 PM	5:00 PM	same day
5:00 PM	7:00 PM	same day
6:00 PM	8:00 PM	same day
9:00 PM	11:00 PM	same day

Why people convert MDT to EDT time

Scheduling a call from MDT to EDT: a 10:00 AM start in MDT lands at 12:00 PM in EDT, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both MDT and EDT are inside the 9-to-5 working day between 9:00 AM and 3:00 PM MDT time (11:00 AM–5:00 PM EDT). That is roughly 6 hours of usable overlap.
Coordinating a MDT-based team with EDT contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.

Always state the zone abbreviation, not just the hour. "3:00 PM MDT" is unambiguous; "3 PM" across a +2h gap is not.
Block 9:00 AM–3:00 PM MDT as the recurring meeting window if you work primarily from MDT and need EDT colleagues present.

About MDT (Mountain Daylight Time)

Mountain Daylight Time (MDT) is observed during summer months in the Mountain Time Zone, except in Arizona which stays on MST year-round. MDT aligns with Central Standard Time (CST) at UTC-06:00.

About EDT (Eastern Daylight Time)

Eastern Daylight Time (EDT) is used during the summer months (second Sunday of March to the first Sunday of November) in the Eastern Time Zone. During EDT, clocks are advanced by one hour to take advantage of longer daylight hours. Not all locations in the Eastern Time Zone observe DST – Panama, Jamaica, and most of the Caribbean remain on EST year-round.

Best time to call between MDT and EDT

Both MDT and EDT sit inside the 9 AM – 5 PM working day between 9:00 AM–3:00 PM MDT, which is 11:00 AM–5:00 PM EDT. That gives roughly 6 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

MDT and EDT share 6 hours of working-hours overlap (9:00 AM–3:00 PM MDT), so scheduling a live meeting is straightforward.

MDT is 2 hours ahead of EDT (MDT UTC-06:00 → EDT UTC-04:00). The shared working window is 9:00 AM–3:00 PM MDT. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

MDT

☀ Currently in DST

Standard: UTC-07:00 · DST: UTC-06:00

Clocks fall back on Sun, Nov 1, 2026

EDT

☀ Currently in DST

Standard: UTC-05:00 · DST: UTC-04:00

Clocks fall back on Sun, Nov 1, 2026

Learn More About Time

Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between MDT and EDT?

MDT (MDT, UTC-06:00) is 2 hours ahead of EDT (EDT, UTC-04:00). The gap is currently +2h.

How do I convert MDT time to EDT time?

Add +2h to MDT local time. For example, 9:00 AM in MDT is 11:00 AM in EDT.

What time is it in EDT right now?

EDT uses EDT at UTC-04:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +2h offset from MDT.

What is the best time to call EDT from MDT?

Call between 9:00 AM and 3:00 PM MDT — that maps to 11:00 AM–5:00 PM EDT and keeps both parties inside the working day.

Which is ahead, MDT or EDT?

MDT is 2 hours ahead of EDT. When it is 12:00 PM in MDT it is 2:00 PM in EDT.

Does daylight saving time affect the MDT–EDT difference?

Neither zone observes daylight saving time, so the +2h offset between MDT and EDT is fixed all year.

Which other cities share MDT's time zone?

MDT also covers Denver, Calgary, Edmonton, Salt Lake City, Boise.

Which countries use MDT, MDT's zone?

MDT is used in United States (Mountain), Canada (Alberta).

Is there a day difference between MDT and EDT?

Not normally. The +2h gap only pushes the date over for late-evening times.

What is the time difference between MDT and EDT?

EDT is +2h from MDT.

What timezone is MDT in?

MDT operates on its local timezone.

What timezone is EDT in?

EDT operates on its local timezone.

Which countries use MDT (Mountain Daylight Time)?

MDT is used in United States (Mountain), Canada (Alberta).

Does MDT observe daylight saving time?

Yes, MDT switches to MST during summer months.

What are some interesting facts about MDT?

MDT shares the same offset as CST (UTC-06:00). Arizona does not switch to MDT, remaining on MST.

Which cities are in the EDT timezone?

Major cities in the EDT timezone include New York City, Washington D.C., Toronto, Miami, Philadelphia, Atlanta, Boston, Montreal.

What is the UTC offset for EDT?

Eastern Daylight Time (EDT) is at UTC-04:00. During daylight saving time, it shifts to EST.

What should I know about the EDT timezone?

EDT is observed from the second Sunday of March to the first Sunday of November. During EDT, the US East Coast is only 4 hours behind London (instead of 5).