HST to Chicago
+5hHST
HSTSOURCEChicago
CDTGreen rows indicate typical business hours (9 AM - 5 PM)
HST and CDT on the World Map
The map below highlights the HST (Hawaii Standard Time) and CDT (Central Standard Time) timezone regions across the globe.
HST – Hawaii Standard Time
UTC-10:00Hawaii Standard Time (HST) is the time zone for the Hawaiian Islands, 10 hours behind UTC.
- •Hawaii does not observe daylight saving time.
- •HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
- •Hawaii is one of only two US states that don't observe DST (the other is Arizona).
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.
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.
Everything You Need to Know About HST and Chicago Time
HST runs on Hawaii Standard Time (HST) at UTC-10:00. Chicago runs on Central Daylight Time (CDT) at UTC-05:00, also currently on daylight saving time. That puts HST 5 hours ahead of Chicago — a difference of +5h at the current offsets.
In practice, when it is 9:00 AM in HST it is 2:00 PM in Chicago. Midnight in HST is 5:00 AM in Chicago.Chicago observes daylight saving time while HST does not, so the gap narrows or widens by an hour part of the year.
HST to Chicago time conversion table
| HST (HST) | Chicago (CDT) | Day |
|---|---|---|
| 12:00 AM | 5:00 AM | same day |
| 6:00 AM | 11:00 AM | same day |
| 7:00 AM | 12:00 PM | same day |
| 8:00 AM | 1:00 PM | same day |
| 9:00 AM | 2:00 PM | same day |
| 12:00 PM | 5:00 PM | same day |
| 3:00 PM | 8:00 PM | same day |
| 5:00 PM | 10:00 PM | same day |
| 6:00 PM | 11:00 PM | same day |
| 9:00 PM | 2:00 AM | next day |
Why people convert HST to Chicago time
- Scheduling a call from HST to Chicago: a 10:00 AM start in HST lands at 3:00 PM in Chicago, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both HST and Chicago are inside the 9-to-5 working day between 9:00 AM and 12:00 PM HST time (2:00 PM–5:00 PM CDT). That is roughly 3 hours of usable overlap.
- Booking travel or deliveries: tracking Chicago local time against HST keeps pickup windows and arrival estimates honest across the +5h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM HST" is unambiguous; "3 PM" across a +5h gap is not.
- Block 9:00 AM–12:00 PM HST as the recurring meeting window if you work primarily from HST and need Chicago colleagues present.
- Chicago: Clocks fall back on Sun, Nov 1, 2026. Any meeting series spanning that date will shift by an hour in local time.
About HST (Hawaii Standard Time)
Hawaii Standard Time (HST) is used in the state of Hawaii and does not observe daylight saving time. This makes HST one of the most consistent time zones in the US. The Hawaiian Islands are among the last places on Earth to see a new calendar day.
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.
Best time to call between HST and Chicago
Both HST and Chicago sit inside the 9 AM – 5 PM working day between 9:00 AM–12:00 PM HST, which is 2:00 PM–5:00 PM CDT. That gives roughly 3 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
HST and Chicago overlap for about 3 hours during the working day — enough for meetings if you avoid the edges of the window.
HST is 5 hours ahead of Chicago (HST UTC-10:00 → CDT UTC-05:00). The shared working window is 9:00 AM–12:00 PM HST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
HST
Does not observe DST
Chicago
☀ Currently in DST
Standard: UTC-06:00 · DST: UTC-05:00
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 HST and Chicago?
HST (HST, UTC-10:00) is 5 hours ahead of Chicago (CDT, UTC-05:00). The gap is currently +5h.
How do I convert HST time to Chicago time?
Add +5h to HST local time. For example, 9:00 AM in HST is 2:00 PM in Chicago.
What time is it in Chicago right now?
Chicago uses CDT at UTC-05:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +5h offset from HST.
What is the best time to call Chicago from HST?
Call between 9:00 AM and 12:00 PM HST — that maps to 2:00 PM–5:00 PM CDT and keeps both parties inside the working day.
Which is ahead, HST or Chicago?
HST is 5 hours ahead of Chicago. When it is 12:00 PM in HST it is 5:00 PM in Chicago.
Do HST and Chicago use different time zones?
HST uses HST at UTC-10:00, while Chicago (USA) uses CDT at UTC-05:00. The IANA identifiers are Pacific/Honolulu and America/Chicago.
Does daylight saving time affect the HST–Chicago difference?
Yes at the moment: Chicago is on daylight saving time and HST is not, so the +5h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share HST's time zone?
HST also covers Honolulu, Hilo, Kailua, Pearl City, Kapolei.
Which countries use HST, HST's zone?
HST is used in United States (Hawaii).
Is there a day difference between HST and Chicago?
Not normally. The +5h gap only pushes the date over for late-evening times.
What is the time difference between HST and Chicago?
Chicago is +5h from HST.
What timezone is HST in?
HST operates on its local timezone.
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 are the business hours in Chicago?
Standard business hours in Chicago are 8:00 AM - 5:00 PM CST.
Which countries use HST (Hawaii Standard Time)?
HST is used in United States (Hawaii).
Does HST observe daylight saving time?
No, HST does not observe daylight saving time and remains at UTC-10:00 year-round.
What are some interesting facts about HST?
Hawaii does not observe daylight saving time. HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
Which cities are in the CST timezone?
Major cities in the CST timezone include Chicago, Houston, Dallas, San Antonio, Mexico City, Austin, Winnipeg, Memphis.
What is the UTC offset for CST?
Central Standard Time (CST) is at UTC-06:00. During daylight saving time, it shifts to CDT.
What should I know about the CST timezone?
CST covers 20 US states fully or partially. Chicago and Houston are the two largest cities in the Central Time Zone.
When is it midnight in HST, what time is it in Chicago?
When it is 12:00 AM (midnight) in HST (HST), it is +5h later in Chicago (CST).
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