Chicago to NST
+1h 30mChicago
CDTSOURCENST
NSTGreen rows indicate typical business hours (9 AM - 5 PM)
CDT and NST on the World Map
The map below highlights the CDT (Central Standard Time) and NST (Newfoundland Standard Time) timezone regions across the globe.
CST – Central Standard Time
UTC-06:00Central Standard Time (CST) is the time zone for the central United States, Canada, and Mexico, 6 hours behind UTC.
- •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.
NST – Newfoundland Standard Time
UTC-03:30Newfoundland Standard Time (NST) is a unique half-hour offset time zone in Canada, 3.5 hours behind UTC.
- •NST is one of only a few half-hour offset time zones in the world.
- •Newfoundland joined Canada in 1949 and kept its unique time zone.
- •St. John's is the easternmost city in North America.
About Chicago
WikipediaChicago operates on Central Time (CST/CDT), 1 hour behind New York. Home to CME and CBOE, Chicago is a global center for derivatives trading.
The Chicago Board of Trade is the world's oldest futures and options exchange.
Comparing Time Zones: Chicago and NST
Chicago runs on Central Daylight Time (CDT) at UTC-05:00, currently observing daylight saving time. NST runs on Newfoundland Standard Time (NST) at UTC-03:30. That puts Chicago 1 hour 30 minutes ahead of NST — a difference of +1h 30m at the current offsets.
In practice, when it is 9:00 AM in Chicago it is 10:30 AM in NST. Midnight in Chicago is 1:30 AM in NST.Chicago observes daylight saving time while NST does not, so the gap narrows or widens by an hour part of the year.
Chicago to NST time conversion table
| Chicago (CDT) | NST (NST) | Day |
|---|---|---|
| 12:00 AM | 1:30 AM | same day |
| 6:00 AM | 7:30 AM | same day |
| 7:00 AM | 8:30 AM | same day |
| 8:00 AM | 9:30 AM | same day |
| 9:00 AM | 10:30 AM | same day |
| 12:00 PM | 1:30 PM | same day |
| 3:00 PM | 4:30 PM | same day |
| 5:00 PM | 6:30 PM | same day |
| 6:00 PM | 7:30 PM | same day |
| 9:00 PM | 10:30 PM | same day |
Why people convert Chicago to NST time
- Scheduling a call from Chicago to NST: a 10:00 AM start in Chicago lands at 11:30 AM in NST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Chicago and NST are inside the 9-to-5 working day between 9:00 AM and 3:30 PM CDT time (10:30 AM–5:00 PM NST). That is roughly 6 hours 30 minutes of usable overlap.
- Booking travel or deliveries: tracking NST local time against Chicago keeps pickup windows and arrival estimates honest across the +1h 30m offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM CDT" is unambiguous; "3 PM" across a +1h 30m gap is not.
- Block 9:00 AM–3:30 PM CDT as the recurring meeting window if you work primarily from Chicago and need NST colleagues present.
- Chicago: Clocks fall back on Sun, Nov 1, 2026. Re-check this page after that date because the offset changes and so does the +1h 30m gap.
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 NST (Newfoundland Standard Time)
Newfoundland Standard Time (NST) is one of the few half-hour offset time zones in the world. It covers the island of Newfoundland in Canada and is 30 minutes ahead of Atlantic Standard Time. This unique offset exists because Newfoundland was an independent country until 1949.
Best time to call between Chicago and NST
Both Chicago and NST sit inside the 9 AM – 5 PM working day between 9:00 AM–3:30 PM CDT, which is 10:30 AM–5:00 PM NST. That gives roughly 6 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
Chicago and NST share 6 hours of working-hours overlap (9:00 AM–3:30 PM CDT), so scheduling a live meeting is straightforward.
Chicago is 1 hour 30 minutes ahead of NST (CDT UTC-05:00 → NST UTC-03:30). The shared working window is 9:00 AM–3:30 PM CDT. 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
NST
☀ Currently in DST
Standard: UTC-03:30 · DST: UTC-02:30
Clocks fall back on Sun, Nov 1, 2026
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between Chicago and NST?
Chicago (CDT, UTC-05:00) is 1 hour 30 minutes ahead of NST (NST, UTC-03:30). The gap is currently +1h 30m.
How do I convert Chicago time to NST time?
Add +1h 30m to Chicago local time. For example, 9:00 AM in Chicago is 10:30 AM in NST.
What time is it in NST right now?
NST uses NST at UTC-03:30. Use the live converter at the top of this page — it updates in real time and already accounts for the +1h 30m offset from Chicago.
What is the best time to call NST from Chicago?
Call between 9:00 AM and 3:30 PM CDT — that maps to 10:30 AM–5:00 PM NST and keeps both parties inside the working day.
Which is ahead, Chicago or NST?
Chicago is 1 hour 30 minutes ahead of NST. When it is 12:00 PM in Chicago it is 1:30 PM in NST.
Do Chicago and NST use different time zones?
Chicago (USA) uses CDT at UTC-05:00, while NST uses NST at UTC-03:30. The IANA identifiers are America/Chicago and America/St_Johns.
Does daylight saving time affect the Chicago–NST difference?
Yes at the moment: Chicago is on daylight saving time and NST is not, so the +1h 30m gap shifts by an hour when exactly one of them changes clocks.
Which other cities share Chicago's time zone?
CDT also covers Chicago, Houston, Dallas, San Antonio, Mexico City, Austin, Winnipeg, Memphis and 6 more.
Which countries use CDT, Chicago's zone?
CDT is used in United States (Central), Canada (Manitoba, Saskatchewan), Mexico, Guatemala, Honduras, El Salvador, Costa Rica, Nicaragua and 1 more.
Is there a day difference between Chicago and NST?
Not normally. The +1h 30m gap only pushes the date over for late-evening times.
What is the time difference between Chicago and NST?
NST is +1h 30m from Chicago.
What timezone is Chicago in?
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.
What timezone is NST in?
NST operates on its local timezone.
What are the business hours in Chicago?
Standard business hours in Chicago are 8:00 AM - 5:00 PM CST.
Which countries use CST (Central Standard Time)?
CST is used in United States (Central), Canada (Manitoba, Saskatchewan), Mexico, Guatemala, Honduras, El Salvador, and 3 more countries.
Does CST observe daylight saving time?
Yes, CST switches to CDT during summer months.
What are some interesting facts about CST?
CST covers 20 US states fully or partially. Chicago and Houston are the two largest cities in the Central Time Zone.
Which cities are in the NST timezone?
Major cities in the NST timezone include St. John's, Corner Brook, Mount Pearl.
What is the UTC offset for NST?
Newfoundland Standard Time (NST) is at UTC-03:30. During daylight saving time, it shifts to NDT.
What should I know about the NST timezone?
NST is one of only a few half-hour offset time zones in the world. Newfoundland joined Canada in 1949 and kept its unique time zone.
When is it midnight in Chicago, what time is it in NST?
When it is 12:00 AM (midnight) in Chicago (CST), it is +1h 30m later in NST (NST).
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