World Timezones

MST to San Diego Converter

Compare San Diego to MST instead
Mountain Time11:28 pmTue, Jun 9
Mountain TimeMDT
North America · UTC-6
11:28 pmTue, Jun 9
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
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3p
4p
5p
6p
7p
8p
9p
10p
11p
San DiegoPDT
CA, United States · UTC-7
10:28 pmTue, Jun 9
11p
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
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7p
8p
9p
10p

Offset

The time difference between Mountain Time and San Diego is 1 hour.

1 hour

Mountain Time (MDT) is ahead of San Diego (PDT).

MDT: UTC-6

PDT: UTC-7

Both zones are currently observing daylight saving time.

When to schedule

Business-hours overlap: 10 AM–5 PM in Mountain Time (9 AM–4 PM in San Diego).

Both teams are in working hours during this window on weekdays.

Suggested time: 1:00 PM Mountain Time (12:00 PM San Diego).

This window may shift by an hour during daylight saving time.

Public holidays in 2026

National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.

United States

  • New Year's DayThu, Jan 1
  • Martin Luther King, Jr. DayMon, Jan 19
  • Presidents DayMon, Feb 16
  • Memorial DayMon, May 25
  • Juneteenth National Independence DayFri, Jun 19
  • Independence DayFri, Jul 3
  • Labour DayMon, Sep 7
  • Columbus DayMon, Oct 12
  • Veterans DayWed, Nov 11
  • Thanksgiving DayThu, Nov 26
  • Christmas DayFri, Dec 25

About these zones

Mountain Time is also known as MST, or MDT. To call United States, dial +1.

San Diego uses Pacific Time (PST, or PDT). To call United States, dial +1.

San Diego is approximately 825 miles southwest of Mountain Time.

Quick reference

Full 24-hour conversion table — tap any time to open it in the converter.

MSTSan DiegoDay
12:00 am11:00 pm-1 day
1:00 am12:00 amSame day
2:00 am1:00 amSame day
3:00 am2:00 amSame day
4:00 am3:00 amSame day
5:00 am4:00 amSame day
6:00 am5:00 amSame day
7:00 am6:00 amSame day
8:00 am7:00 amSame day
9:00 am8:00 amSame day
10:00 am9:00 amSame day
11:00 am10:00 amSame day
12:00 pm11:00 amSame day
1:00 pm12:00 pmSame day
2:00 pm1:00 pmSame day
3:00 pm2:00 pmSame day
4:00 pm3:00 pmSame day
5:00 pm4:00 pmSame day
6:00 pm5:00 pmSame day
7:00 pm6:00 pmSame day
8:00 pm7:00 pmSame day
9:00 pm8:00 pmSame day
10:00 pm9:00 pmSame day
11:00 pm10:00 pmSame day

Daylight saving time

Both Mountain Time and San Diego observe daylight saving time and transition on the same date.

Next transition: Sunday, November 1, 2026 (fall back).

Because they transition simultaneously, the offset between these zones remains constant year-round.

See the daylight saving time page for transition dates across every time zone.

Daylight today

Mountain Time
Sunrise
5:33 AM
Sunset
8:28 PM
Day length
14h 55m
San Diego
Sunrise
5:41 AM
Sunset
7:56 PM
Day length
14h 15m

Daylight overlap: 13h 46m — 6:41 AM–8:28 PM in Mountain Time (5:41 AM–7:28 PM in San Diego). Both locations are in daylight during this window.

Cities in these zones

Cities in Mountain Time

Browse all cities to see the current local time anywhere.

Airports in these zones

Airports in Mountain Time

  • BJC
  • DEN
  • OGD
  • SLC

Airports in Pacific Time

  • BUR
  • HHR
  • LAX
  • LGB
  • SNA
  • CLD
  • SAN
  • TIJ
  • OAK
  • SFO

Related conversions

Common conversions

What is 9:00 am MST in San Diego?
9:00 am MST is 8:00 am San Diego.
What is 12:00 pm MST in San Diego?
12:00 pm MST is 11:00 am San Diego.
What is 12:30 pm MST in San Diego?
12:30 pm MST is 11:30 am San Diego.
What is 2:00 pm MST in San Diego?
2:00 pm MST is 1:00 pm San Diego.
What is 5:00 pm MST in San Diego?
5:00 pm MST is 4:00 pm San Diego.
What is 11:30 pm MST in San Diego?
11:30 pm MST is 10:30 pm San Diego.