HST to CST
+4hHST
HSTSOURCECST
CSTGreen rows indicate typical business hours (9 AM - 5 PM)
HST and CST on the World Map
The map below highlights the HST (Hawaii Standard Time) and CST (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.
Everything You Need to Know About HST and CST Time
HST runs on Hawaii Standard Time (HST) at UTC-10:00. CST runs on Central Standard Time (CST) at UTC-06:00. That puts HST 4 hours ahead of CST — a difference of +4h at the current offsets.
In practice, when it is 9:00 AM in HST it is 1:00 PM in CST. Midnight in HST is 4:00 AM in CST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
HST to CST time conversion table
| HST (HST) | CST (CST) | Day |
|---|---|---|
| 12:00 AM | 4:00 AM | same day |
| 6:00 AM | 10:00 AM | same day |
| 7:00 AM | 11:00 AM | same day |
| 8:00 AM | 12:00 PM | same day |
| 9:00 AM | 1:00 PM | same day |
| 12:00 PM | 4:00 PM | same day |
| 3:00 PM | 7:00 PM | same day |
| 5:00 PM | 9:00 PM | same day |
| 6:00 PM | 10:00 PM | same day |
| 9:00 PM | 1:00 AM | next day |
Why people convert HST to CST time
- Scheduling a call from HST to CST: a 10:00 AM start in HST lands at 2:00 PM in CST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both HST and CST are inside the 9-to-5 working day between 9:00 AM and 1:00 PM HST time (1:00 PM–5:00 PM CST). That is roughly 4 hours of usable overlap.
- Coordinating a HST-based team with CST 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 HST" is unambiguous; "3 PM" across a +4h gap is not.
- Block 9:00 AM–1:00 PM HST as the recurring meeting window if you work primarily from HST and need CST colleagues present.
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 CST
Both HST and CST sit inside the 9 AM – 5 PM working day between 9:00 AM–1:00 PM HST, which is 1:00 PM–5:00 PM CST. That gives roughly 4 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
HST and CST overlap for about 4 hours during the working day — enough for meetings if you avoid the edges of the window.
HST is 4 hours ahead of CST (HST UTC-10:00 → CST UTC-06:00). The shared working window is 9:00 AM–1:00 PM HST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
HST
Does not observe DST
CST
☀ 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 CST?
HST (HST, UTC-10:00) is 4 hours ahead of CST (CST, UTC-06:00). The gap is currently +4h.
How do I convert HST time to CST time?
Add +4h to HST local time. For example, 9:00 AM in HST is 1:00 PM in CST.
What time is it in CST right now?
CST uses CST at UTC-06:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +4h offset from HST.
What is the best time to call CST from HST?
Call between 9:00 AM and 1:00 PM HST — that maps to 1:00 PM–5:00 PM CST and keeps both parties inside the working day.
Which is ahead, HST or CST?
HST is 4 hours ahead of CST. When it is 12:00 PM in HST it is 4:00 PM in CST.
Does daylight saving time affect the HST–CST difference?
Neither zone observes daylight saving time, so the +4h offset between HST and CST is fixed all year.
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 CST?
Not normally. The +4h gap only pushes the date over for late-evening times.
What is the time difference between HST and CST?
CST is +4h from HST.
What timezone is HST in?
HST operates on its local timezone.
What timezone is CST in?
CST operates on its local timezone.
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 CST?
When it is 12:00 AM (midnight) in HST (HST), it is +4h later in CST (CST).
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See every conversion from HST →·See every conversion from CST →