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NDT/NST

Newfoundland Daylight Time

GMT -2:30

12am

3am

6am

9am

12pm

3pm

6pm

9pm

Newfoundland Time is on daylight saving time: NDT (UTC−2:30) until Sun, Nov 1.

Use NST all year (UTC−3:30)

MDT/MST

Mountain Daylight Time

GMT -6

12am

3am

6am

9am

12pm

3pm

6pm

9pm

Mountain Time is on daylight saving time: MDT (UTC−6) until Sun, Nov 1.

Arizona stays on MST (UTC−7).

Denver · MDT (UTC−6)Arizona · MST all year (UTC−7)

Quick answers

Selected conversion

9:30 am09:30 NDT (UTC-2:30), Oct 4, 2026 = 6:00 am06:00 MDT (UTC-6), Oct 4, 2026

NDT is 3 hours and 30 minutes ahead of MDT.

NST and MST examples

These examples always use NST (UTC-3:30) and MST (UTC-7). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

NST is 3 hours and 30 minutes ahead of MST.

How the time difference changes

For most of the year, NDT is 3 hours and 30 minutes ahead of MDT. At other times of the year, NST is 3 hours and 30 minutes ahead of MST. Briefly around clock changes, NDT is 4 hours and 30 minutes ahead of MST or NST is 2 hours and 30 minutes ahead of MDT.

For most of the year, working hours of 9:00 am to 5:00 pm in NDT correspond to 5:30 am to 1:30 pm in MDT. At other times of the year, working hours of 9:00 am to 5:00 pm in NST correspond to 5:30 am to 1:30 pm in MST.For most of the year, working hours of 09:00 to 17:00 in NDT correspond to 05:30 to 13:30 in MDT. At other times of the year, working hours of 09:00 to 17:00 in NST correspond to 05:30 to 13:30 in MST.

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

Time Difference

Newfoundland Daylight Time is 3 hours and 30 minutes ahead of Mountain Daylight Time.
9:30 am09:30 in NDT is 6:00 am06:00 in MDT

NDT to MDT call time
Best time for a conference call or a meeting is between 12:30pm-5pm12:30-17:00 in NDT which corresponds to 9am-1:30pm09:00-13:30 in MDT

9:30 am09:30 Newfoundland Daylight Time (NDT). Offset UTC -2:30 hours
6:00 am06:00 Mountain Daylight Time (MDT). Offset UTC -6:00 hours

9:30 am09:30 NDT / 6:00 am06:00 MDT

NDT	MDT
12:00am	8:30pm
1:00am	9:30pm
2:00am	10:30pm
3:00am	11:30pm
4:00am	12:30am
5:00am	1:30am
6:00am	2:30am
7:00am	3:30am
8:00am	4:30am
9:00am	5:30am
10:00am	6:30am
11:00am	7:30am
12:00pm	8:30am
1:00pm	9:30am
2:00pm	10:30am
3:00pm	11:30am
4:00pm	12:30pm
5:00pm	1:30pm
6:00pm	2:30pm
7:00pm	3:30pm
8:00pm	4:30pm
9:00pm	5:30pm
10:00pm	6:30pm
11:00pm	7:30pm
00:00	20:30
01:00	21:30
02:00	22:30
03:00	23:30
04:00	00:30
05:00	01:30
06:00	02:30
07:00	03:30
08:00	04:30
09:00	05:30
10:00	06:30
11:00	07:30
12:00	08:30
13:00	09:30
14:00	10:30
15:00	11:30
16:00	12:30
17:00	13:30
18:00	14:30
19:00	15:30
20:00	16:30
21:00	17:30
22:00	18:30
23:00	19:30

Newfoundland Standard Time

Offset: NST is 3 hours and 30 minutes behind Greenwich Mean Time (GMT) and is used in North America

Countries using this time zone: Canada

Principal Cities: The largest city in the NST time zone is St Johns in Canada, with about 110,525 people. Other major cities in this time zone include Conception Bay South, Mount Pearl, Corner Brook.

French: HNT - Heure Normale de Terre-Neuve

NST Time Zone Geo Map — NST timezone map

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

End: Newfoundland Standard Time (NST) 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: Newfoundland Standard Time (NST) 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.

NST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data

-0330 - basic
-03:30 - extended

Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers

-0330 - sign character (-) followed by a four digit time providing hours (03) and minutes (30) of the offset. Indicates an offset of three hours and thirty minutes to the west of the zero meridian.

IANA/Olson: Reflects NST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems

America/St_Johns
Canada/Newfoundland

Mountain Standard Time

Offset: MST is 7 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 MST time zone is Phoenix in the United States, with about 1.65 million people. Other major cities in this time zone include Calgary, Edmonton, Hermosillo, Culiacan.

French: HNR - Heure Normale des Rocheuses

Spanish: MT - Zona Pacífico

MST Time Zone Geo Map — MST timezone map

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

End: Mountain Standard Time (MST) 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: Mountain Standard Time (MST) 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.