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).

Chicago to Greece

+8h

Chicago

CDTSOURCE

USA · UTC-05:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Greece

EEST

UTC+03:00☀ DST active

HH08

MM00

20:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Chicago

Greece

12:00 AM

8:00 AM

2:00 AM

10:00 AM

4:00 AM

12:00 PM

6:00 AM

2:00 PM

8:00 AM

4:00 PM

10:00 AM

6:00 PM

12:00 PM

8:00 PM

2:00 PM

10:00 PM

4:00 PM

12:00 AM+1

6:00 PM

2:00 AM+1

8:00 PM

4:00 AM+1

10:00 PM

6:00 AM+1

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

CDT and EEST on the World Map

The map below highlights the CDT (Central Standard Time) and EEST (Eastern European Time) timezone regions across the globe.

CDT Zone

→

EEST Zone

Explore all world timezones interactively →

CST – Central Standard Time

UTC-06:00

Central Standard Time (CST) is the time zone for the central United States, Canada, and Mexico, 6 hours behind UTC.

Countries in CST

United States (Central)Canada (Manitoba, Saskatchewan)MexicoGuatemalaHondurasEl SalvadorCosta RicaNicaraguaBelize

Major Cities in CST

ChicagoHoustonDallasSan AntonioMexico CityAustinWinnipegMemphisMilwaukeeNashvilleKansas CityNew OrleansMinneapolisGuatemala City

Key Facts about CST

•CST covers 20 US states fully or partially.
•Chicago and Houston are the two largest cities in the Central Time Zone.
•Mexico City, one of the world's most populous cities, operates on CST.
•CST is 1 hour behind EST and 2 hours ahead of PST.

Daylight Saving:Yes – switches to CDT

Learn more about CST on Wikipedia

EET – Eastern European Time

UTC+02:00

Eastern European Time (EET) is used in Eastern Europe, the Middle East, and northeastern Africa, 2 hours ahead of UTC.

Countries in EET

FinlandGreeceRomaniaBulgariaUkraineEgyptIsraelLebanonJordanLithuaniaLatviaEstoniaMoldovaLibyaSyriaPalestineCyprus

Major Cities in EET

CairoAthensHelsinkiBucharestKyivSofiaJerusalemTel AvivBeirutVilniusRigaTallinn

Key Facts about EET

•EET covers countries across three continents: Europe, Asia, and Africa.
•Cairo is the most populous city in the EET zone.
•Turkey used to be on EET but permanently moved to UTC+03:00 in 2016.
•Finland, the Baltic states, and Greece all use EET.

Daylight Saving:Yes – switches to EEST

Learn more about EET on Wikipedia

About Chicago

Wikipedia

Chicago operates on Central Time (CST/CDT), 1 hour behind New York. Home to CME and CBOE, Chicago is a global center for derivatives trading.

Population:2.7 million

Metro:9.5 million

Business Hours:8:00 AM - 5:00 PM CST

Currency:USD ($)

Stock Exchange:CME (Chicago Mercantile Exchange), CBOE

Key Landmarks

Willis TowerMillennium ParkCloud Gate (The Bean)Navy PierArt Institute of Chicago

Did You Know?

The Chicago Board of Trade is the world's oldest futures and options exchange.

Learn more about CDT timezone →

Comparing Time Zones: Chicago and Greece

Chicago runs on Central Daylight Time (CDT) at UTC-05:00, currently observing daylight saving time. Greece runs on Eastern European Summer Time (EEST) at UTC+03:00, also currently on daylight saving time. That puts Chicago 8 hours ahead of Greece — a difference of +8h at the current offsets.

In practice, when it is 9:00 AM in Chicago it is 5:00 PM in Greece. Midnight in Chicago is 8:00 AM in Greece. Because both zones shift for daylight saving, the gap between them only changes during the few weeks each year when their transition dates differ.

Chicago to Greece time conversion table

Chicago (CDT)	Greece (EEST)	Day
12:00 AM	8:00 AM	same day
6:00 AM	2:00 PM	same day
7:00 AM	3:00 PM	same day
8:00 AM	4:00 PM	same day
9:00 AM	5:00 PM	same day
12:00 PM	8:00 PM	same day
3:00 PM	11:00 PM	same day
5:00 PM	1:00 AM	next day
6:00 PM	2:00 AM	next day
9:00 PM	5:00 AM	next day

Why people convert Chicago to Greece time

Scheduling a call from Chicago to Greece: a 10:00 AM start in Chicago lands at 6:00 PM in Greece, so you can confirm the slot without doing the arithmetic yourself.
Handling a +8h gap: Chicago and Greece have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in Greece is 5:00 PM in Chicago.
Coordinating a Chicago-based team with Greece 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 CDT" is unambiguous; "3 PM" across a +8h gap is not.
With a +8h gap there is no shared 9-to-5 window, so alternate the early start: one week Chicago takes the early slot, the next week Greece does.
Chicago: Clocks fall back on Sun, Nov 1, 2026. Re-check this page after that date because the offset changes and so does the +8h gap.
Greece: Clocks fall back on Sun, Oct 25, 2026. Any meeting series spanning that date will shift by an hour in local time.

About CST (Central Standard Time)

Central Standard Time (CST) covers the central region of North America. It is the second most populous time zone in the US, including major cities like Chicago, Houston, and Dallas. CST is also used in Mexico City and much of Central America including Guatemala, Honduras, El Salvador, and Costa Rica. During summer, most of the US and Canada switch to Central Daylight Time (CDT, UTC-05:00), while Mexico and Central American countries generally remain on CST.

About EET (Eastern European Time)

Eastern European Time (EET) covers a wide geographical area including Eastern Europe (Finland, Greece, Romania, Bulgaria, Ukraine), the Middle East (Israel, Lebanon, Jordan), and northeastern Africa (Egypt, Libya). During summer, most EET countries switch to Eastern European Summer Time (EEST, UTC+03:00). Turkey permanently moved to UTC+03:00 in 2016, effectively leaving EET.

Best time to call between Chicago and Greece

With a +8h offset there is no overlap inside a normal 9 AM – 5 PM day. Greece opens at 9:00 AM EEST, which is 5:00 PM in Chicago, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

Chicago and Greece have no shared working hours because of the +8h gap. Teams need to alternate early starts or rely on asynchronous handovers.

Chicago is 8 hours ahead of Greece (CDT UTC-05:00 → EEST UTC+03:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

Chicago

☀ Currently in DST

Standard: UTC-06:00 · DST: UTC-05:00

Clocks fall back on Sun, Nov 1, 2026

Greece

☀ Currently in DST

Standard: UTC+02:00 · DST: UTC+03:00

Clocks fall back on Sun, Oct 25, 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 Chicago and Greece?

Chicago (CDT, UTC-05:00) is 8 hours ahead of Greece (EEST, UTC+03:00). The gap is currently +8h.

How do I convert Chicago time to Greece time?

Add +8h to Chicago local time. For example, 9:00 AM in Chicago is 5:00 PM in Greece.

What time is it in Greece right now?

Greece uses EEST at UTC+03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +8h offset from Chicago.

What is the best time to call Greece from Chicago?

There is no shared working-hours window because of the +8h gap. The closest option is 1:00 PM in Chicago, which is 9:00 PM in Greece.

Which is ahead, Chicago or Greece?

Chicago is 8 hours ahead of Greece. When it is 12:00 PM in Chicago it is 8:00 PM in Greece.

Do Chicago and Greece use different time zones?

Chicago (USA) uses CDT at UTC-05:00, while Greece (Greece) uses EEST at UTC+03:00. The IANA identifiers are America/Chicago and Europe/Athens.

Does daylight saving time affect the Chicago–Greece difference?

Both zones observe DST, so the difference stays at +8h for most of the year and only changes during the weeks when their transition dates do not line up.