Updating current time…
Illinois, USACST
UTC−6
12am
3am
6am
9am
12pm
3pm
6pm
9pm
MST
UTC−7
1h behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

6:00 am06:00 CST (UTC-6), Nov 15, 2026 = 5:00 am05:00 MST (UTC-7), Nov 15, 2026

Lake Forest is 1 hour ahead of MST.

How the time difference changes

For most of the year, Lake Forest, IL, USA is 1 hour ahead of MDT. From Nov 1, 2026 to Mar 14, 2027, and from Nov 7, 2027 to Mar 12, 2028, Lake Forest, IL, USA is 1 hour ahead of MST. Briefly around clock changes, Lake Forest, IL, USA is 2 hours ahead of MST or Lake Forest, IL, USA and MDT have the same time.

For most of the year, working hours of 9:00 am to 6:00 pm in Lake Forest, IL, USA correspond to 8:00 am to 5:00 pm in MDT. At other times of the year, working hours of 9:00 am to 6:00 pm in Lake Forest, IL, USA correspond to 8:00 am to 5:00 pm in MST.For most of the year, working hours of 09:00 to 18:00 in Lake Forest, IL, USA correspond to 08:00 to 17:00 in MDT. At other times of the year, working hours of 09:00 to 18:00 in Lake Forest, IL, USA correspond to 08:00 to 17:00 in MST.

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

Time Difference

CST (Central Standard Time) is 1 hour ahead of Mountain Standard Time.
6:00 am06:00 in Lake Forest, IL, USA is 5:00 am05:00 in MST

Lake Forest to MST call time
Best time for a conference call or a meeting is between 10am-6pm10:00-18:00 in Lake Forest which corresponds to 9am-5pm09:00-17:00 in MST.

6:00 am06:00 CST (Central Standard Time) (Lake Forest, IL, USA). Offset UTC -6:00 hours
5:00 am05:00 Mountain Standard Time (MST). Offset UTC -7:00 hours

6:00 am06:00 Lake Forest, IL, USA / 5:00 am05:00 MST

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Hourly time comparison
Lake Forest, IL, USAMST
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Lake Forest Time Zone and Facts

Time Zone

Abbreviation / Offset
CST – Central Standard Time, UTC-6 (now)
CDT – Central Daylight Time, UTC-5 (daylight saving time)
Daylight Saving Time Starts
123456789101112Sunday, March 14, 2027 at 2:00 amSunday, March 14, 2027 at 02:00: clocks go forward 1 hour to 3:00 am03:00 (CDT). DST starts on the 2nd Sunday of March each year. Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
123456789101112Sunday, November 7, 2027 at 2:00 amSunday, November 7, 2027 at 02:00: clocks go back 1 hour to 1:00 am01:00 (CST). DST ends on the 1st Sunday of November each year. Also called Fall Back or Winter Time.

Lake Forest Facts

Country
USA
State
Illinois
Alternative Names
Lejk Forist, leikeupoliseuteu, leka pharesta, lyk fwrst, lyk fwrst aylynwy, reikuforesuto, Лејк Форист, ليك فورست, لیک فورست، ایلینوی, لیک فوریسٹ، الینوائے, लेक फरेस्ट, レイクフォレスト, 레이크포리스트
Population
19,408
Currency
Dollar (USD)
Geographic Coordinates
42° 15' N Latitude / 87° 50' W Longitude
International Dialing Code
+1

Mountain Standard Time

Offset: MST is 7 hours behind Greenwich Mean Time (GMT).

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 Ciudad Juárez, Hermosillo, Culiacán, Denver.

French: HNR - Heure Normale des Rocheuses

Spanish: MT - Zona Pacífico

Map of the areas on Mountain Standard Time (MST)
MST all year MST part of the year

Today all shaded areas are on MST.

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).

123456789101112Start: Mountain Standard Time (MST) started on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks were set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.

123456789101112End: Mountain Standard Time (MST) ends on Sunday, March 14, 2027 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 14, 2027, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.

See USA daylight saving time and upcoming clock changes worldwide.

MST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -07 - basic short
  • -0700 - basic
  • -07:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0700 - sign character (-) followed by a four digit time providing hours (07) and minutes (00) of the offset. Indicates an offset of seven hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Tango - Military abbreviation for MST
  • T - short form of 'Tango'
IANA/Olson: Reflects MST 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/Creston
  • America/Dawson
  • America/Dawson_Creek
  • America/Denver
  • America/Edmonton
  • America/Fort_Nelson
  • America/Hermosillo
  • America/Inuvik
  • America/Mazatlan
  • America/Phoenix
  • America/Shiprock
  • America/Whitehorse
  • America/Yellowknife
  • Canada/Mountain
  • Canada/Yukon
  • MST
  • MST7MDT
  • Mexico/BajaSur
  • Navajo
  • US/Arizona
  • US/Mountain
Time zones with the GMT -7 offset:
  • MST - Mountain Standard Time
  • PDT - Pacific Daylight Time
  • YST - Yukon Standard Time
  • T - Tango Time Zone