CDT to HST
-5hCDT
CDTSOURCEHST
HSTGreen rows indicate typical business hours (9 AM - 5 PM)
CDT and HST on the World Map
The map below highlights the CDT (Central Daylight Time) and HST (Hawaii Standard Time) timezone regions across the globe.
CDT – Central Daylight Time
UTC-05:00Central Daylight Time (CDT) is the daylight saving offset in the Central Time Zone, 5 hours behind UTC.
- •CDT is the same offset as EST (UTC-05:00), which can cause confusion.
- •CDT runs from the second Sunday in March to the first Sunday in November.
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).
Time Conversion Guide: CDT to HST
CDT runs on Central Daylight Time (CDT) at UTC-05:00. HST runs on Hawaii Standard Time (HST) at UTC-10:00. That puts CDT 5 hours behind HST — a difference of -5h at the current offsets.
In practice, when it is 9:00 AM in CDT it is 4:00 AM in HST. Midnight in CDT is 7:00 PM in HST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
CDT to HST time conversion table
| CDT (CDT) | HST (HST) | Day |
|---|---|---|
| 12:00 AM | 7:00 PM | previous day |
| 6:00 AM | 1:00 AM | same day |
| 7:00 AM | 2:00 AM | same day |
| 8:00 AM | 3:00 AM | same day |
| 9:00 AM | 4:00 AM | same day |
| 12:00 PM | 7:00 AM | same day |
| 3:00 PM | 10:00 AM | same day |
| 5:00 PM | 12:00 PM | same day |
| 6:00 PM | 1:00 PM | same day |
| 9:00 PM | 4:00 PM | same day |
Why people convert CDT to HST time
- Scheduling a call from CDT to HST: a 10:00 AM start in CDT lands at 5:00 AM in HST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both CDT and HST are inside the 9-to-5 working day between 2:00 PM and 5:00 PM CDT time (9:00 AM–12:00 PM HST). That is roughly 3 hours of usable overlap.
- Booking travel or deliveries: tracking HST local time against CDT keeps pickup windows and arrival estimates honest across the -5h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM CDT" is unambiguous; "3 PM" across a -5h gap is not.
- Block 2:00 PM–5:00 PM CDT as the recurring meeting window if you work primarily from CDT and need HST colleagues present.
About CDT (Central Daylight Time)
Central Daylight Time (CDT) is observed during summer months in the US and Canadian portions of the Central Time Zone. Clocks are moved forward by one hour, aligning with Eastern Standard Time (EST). Most of Mexico and Central America do not observe CDT, staying on CST year-round.
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.
Best time to call between CDT and HST
Both CDT and HST sit inside the 9 AM – 5 PM working day between 2:00 PM–5:00 PM CDT, which is 9:00 AM–12:00 PM HST. That gives roughly 3 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
CDT and HST overlap for about 3 hours during the working day — enough for meetings if you avoid the edges of the window.
CDT is 5 hours behind HST (CDT UTC-05:00 → HST UTC-10:00). The shared working window is 2:00 PM–5:00 PM CDT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
CDT
☀ Currently in DST
Standard: UTC-06:00 · DST: UTC-05:00
Clocks fall back on Sun, Nov 1, 2026
HST
Does not observe DST
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 CDT and HST?
CDT (CDT, UTC-05:00) is 5 hours behind HST (HST, UTC-10:00). The gap is currently -5h.
How do I convert CDT time to HST time?
Add -5h to CDT local time. For example, 9:00 AM in CDT is 4:00 AM in HST.
What time is it in HST right now?
HST uses HST at UTC-10:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -5h offset from CDT.
What is the best time to call HST from CDT?
Call between 2:00 PM and 5:00 PM CDT — that maps to 9:00 AM–12:00 PM HST and keeps both parties inside the working day.
Which is behind, CDT or HST?
CDT is 5 hours behind HST. When it is 12:00 PM in CDT it is 7:00 AM in HST.
Does daylight saving time affect the CDT–HST difference?
Neither zone observes daylight saving time, so the -5h offset between CDT and HST is fixed all year.
Which other cities share CDT's time zone?
CDT also covers Chicago, Houston, Dallas, Austin, Winnipeg, Nashville.
Which countries use CDT, CDT's zone?
CDT is used in United States (Central), Canada (Manitoba).
Is there a day difference between CDT and HST?
Not normally. The -5h gap only pushes the date over the previous day.
What is the time difference between CDT and HST?
HST is -5h from CDT.
What timezone is CDT in?
CDT operates on its local timezone.
What timezone is HST in?
HST operates on its local timezone.
Which countries use CDT (Central Daylight Time)?
CDT is used in United States (Central), Canada (Manitoba).
Does CDT observe daylight saving time?
Yes, CDT switches to CST during summer months.
What are some interesting facts about CDT?
CDT is the same offset as EST (UTC-05:00), which can cause confusion. CDT runs from the second Sunday in March to the first Sunday in November.
Which cities are in the HST timezone?
Major cities in the HST timezone include Honolulu, Hilo, Kailua, Pearl City, Kapolei.
What is the UTC offset for HST?
Hawaii Standard Time (HST) is at UTC-10:00.
What should I know about the HST timezone?
Hawaii does not observe daylight saving time. HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
When is it midnight in CDT, what time is it in HST?
When it is 12:00 AM (midnight) in CDT (CDT), it is -5h later in HST (HST).
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See every conversion from CDT →·See every conversion from HST →