Thunder Bay to CDT Time Converter

Updating current time…
Thunder Bay
CanadaEDT
UTC−4
12am
3am
6am
9am
12pm
3pm
6pm
9pm
CDT
Central Daylight Time
UTC−5
1h behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

8:00 am08:00 EDT (UTC-4), Oct 16, 2026 = 7:00 am07:00 CDT (UTC-5), Oct 16, 2026

Thunder Bay is 1 hour ahead of CDT.

How the time difference changes

For most of the year, Thunder Bay is 1 hour ahead of CDT. From Nov 1, 2026 to Mar 14, 2027, Thunder Bay is 1 hour ahead of CST. Briefly around clock changes, Thunder Bay is 2 hours ahead of CST or Thunder Bay and CDT have the same time.

For most of the year, working hours of 9:00 am to 6:00 pm in Thunder Bay correspond to 8:00 am to 5:00 pm in CDT. At other times of the year, working hours of 9:00 am to 6:00 pm in Thunder Bay correspond to 8:00 am to 5:00 pm in CST.For most of the year, working hours of 09:00 to 18:00 in Thunder Bay correspond to 08:00 to 17:00 in CDT. At other times of the year, working hours of 09:00 to 18:00 in Thunder Bay correspond to 08:00 to 17:00 in CST.

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

Time Difference

EDT (Eastern Daylight Time) is 1 hour ahead of Central Daylight Time.
8:00 am08:00 in Thunder Bay, Canada is 7:00 am07:00 in CDT

Thunder Bay to CDT call time
Best time for a conference call or a meeting is between 10am-6pm10:00-18:00 in Thunder Bay which corresponds to 9am-5pm09:00-17:00 in CDT

8:00 am08:00 EDT (Eastern Daylight Time) (Thunder Bay, Canada). Offset UTC -4:00 hours
7:00 am07:00 Central Daylight Time (CDT). Offset UTC -5:00 hours

8:00 am08:00 Thunder Bay, Canada / 7:00 am07:00 CDT

Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.

Hourly time comparison
Thunder Bay, CanadaCDT
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Thunder Bay Time Zone and Facts

Time Zone

Abbreviation / Offset
EDT – Eastern Daylight Time, UTC-4 (now, daylight saving time)
EST – Eastern Standard Time, UTC-5 (standard time)
Daylight Saving Time Ends
123456789101112Sunday, November 1, 2026 at 2:00 amSunday, November 1, 2026 at 02:00: clocks go back 1 hour to 1:00 am01:00 (EST). DST ends on the 1st Sunday of November each year. Also called Fall Back or Winter 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 (EDT). DST starts on the 2nd Sunday of March each year. Also called Spring Forward or Summer Time.
Clock Changes
Canada daylight saving time · Clock changes worldwide

Thunder Bay Facts

Country
Canada
Alternative Names
Tander Bej, Tander Bejus, Tander Bėjus, Tander-Bej, Thunder Bay, Tundurbej, YQT, sandabei, sang de bei, seondeobei, thandr bay, thandr by, Тандер Беј, Тандер-Бей, Тъндърбей, תאנדר ביי, تھنڈر بے, تھنڈربے، انٹاریو, ثاندر باي, ثاندر بی, തണ്ടർ ബേ, サンダーベイ, 桑德贝, 선더베이
Population
108,843
Currency
Dollar (CAD)
Geographic Coordinates
48° 22' N Latitude / 89° 15' W Longitude
International Dialing Code
+1
More About Thunder Bay
Thunder Bay local time and city facts

Central Daylight Time

Offset: CDT is 5 hours behind Greenwich Mean Time (GMT).

Countries using this time zone: Canada, Mexico, United States

Principal Cities: The largest city in the CDT time zone is Chicago in the United States, with about 2.664 million people. Other major cities in this time zone include Houston, San Antonio, Dallas, Fort Worth.

French: HAC - Heure Avancée du Centre

Spanish: CT - Zona Centro

Map of the areas on Central Daylight Time (CDT)
CDT part of the year

Today all shaded areas are on CDT.

Open the world time zone map© OpenStreetMap

Daylight Saving: Central Daylight Time (CDT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Central Standard Time (CST).

123456789101112Start: Central Daylight Time (CDT) started 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. Daylight saving starts annually on the second Sunday of March.

123456789101112End: Central Daylight Time (CDT) ends 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 local standard time instead. Daylight saving ends annually on the first Sunday of November.

See USA daylight saving time and upcoming clock changes worldwide.

CDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -05 - basic short
  • -0500 - basic
  • -05:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0500 - sign character (-) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates an offset of five hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Romeo - Military abbreviation for CDT
  • R - short form of 'Romeo'
IANA/Olson: Reflects CDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Chicago
  • America/Indiana/Knox
  • America/Indiana/Tell_City
  • America/Knox_IN
  • America/Matamoros
  • America/Menominee
  • America/North_Dakota/Beulah
  • America/North_Dakota/Center
  • America/North_Dakota/New_Salem
  • America/Ojinaga
  • America/Rainy_River
  • America/Rankin_Inlet
  • America/Resolute
  • America/Winnipeg
  • CST6CDT
  • Canada/Central
  • US/Central
  • US/Indiana-Starke
CDT Abbreviation: Several time zones share CDT abbreviation and it could refer to these time zones
  • Central Daylight Time - UTC -5
  • Cuba Daylight Time - UTC -4
Time zones with the GMT -5 offset:
  • CDT - Central Daylight Time
  • EST - Eastern Standard Time
  • ET - Eastern Time
  • COT - Colombia Time
  • CST - Cuba Standard Time
  • EASST - Easter Island Summer Time
  • ECT - Ecuador Time
  • PET - Peru Time
  • R - Romeo Time Zone
EST to ISTGMT to ESTPST to ESTEST to GMTPST to GMT