What is the time difference between HST and CST?

Central Standard Time (CST) is 5 hours ahead of Hawaii Standard Time (HST). HST uses a UTC offset of UTC-10, while CST uses UTC-5. For example, when it's 9:00 AM in HST, it's 2:00 PM in CST. Note that this difference may shift by one hour during daylight saving time transitions if CST observes DST. Use the conversion table above to see the exact time for each hour of the day.

How do I convert HST to CST?

To convert HST to CST, add 5 hours to the HST time. For example, 9:00 AM HST is 2:00 PM CST, and 5:00 PM HST is 10:00 PM CST. Keep in mind that during daylight saving time transitions, the offset between these timezones may temporarily change by one hour. You can also use the interactive converter above for quick, accurate results.

What time is it in CST when it's noon in HST?

When it's 12:00 PM (noon) in HST, it's 5:00 PM in CST. This is because CST is 5 hours ahead of HST. Similarly, when it's 6:00 PM in HST, it's 11:00 PM in CST. During daylight saving time transitions, these times may shift by one hour, so always verify the current offset. The color-coded conversion table above shows every hour mapped between both timezones.

How many hours ahead is CST from HST?

CST is 5 hours ahead of HST. This means when it's 9:00 AM in HST, it's 2:00 PM in CST, and when it's midnight in HST, it's 5:00 AM in CST. The exact difference can vary by one hour during daylight saving time transitions. The conversion table above provides a complete hour-by-hour mapping.

Is CST ahead or behind HST?

CST is ahead of HST by 5 hours. Clocks in CST show a later time than HST, meaning the day starts earlier in CST relative to HST. For example, when it's morning in HST, it's later in the morning in CST. This gap may change by one hour during DST transitions.

Does HST observe daylight saving time?

No, Hawaii Standard Time does not observe daylight saving time. The UTC offset of UTC-10 remains the same year-round, making time conversions from HST more predictable. Countries and regions in this timezone keep their clocks unchanged regardless of the season.

Does CST observe daylight saving time?

Yes, Central Standard Time observes daylight saving time. During DST, the abbreviation changes to CDT and clocks move forward by one hour, typically in spring. Clocks then fall back in autumn, returning to standard CST time. This means the UTC offset for CST shifts between two values depending on the season. Check our DST change calendar for exact transition dates that may affect your HST to CST conversions.

What is the best time to call from HST to CST?

The best time for a call between HST and CST is during overlapping business hours (9 AM – 5 PM) in both timezones. To reach someone in CST during their work day, call between 4:00 AM and 12:00 PM your HST time. Avoid calling too early or late, as the 5 hours difference means your evening could be their late night. Check the color-coded conversion table above — green hours indicate business hours in both zones, making it easy to find the ideal time.

When does daylight saving time change in CST?

Daylight saving time transitions vary by year and region. Central Standard Time observes DST, which typically shifts clocks forward by one hour in spring ("spring forward") and back in fall ("fall back"). During these transition periods, the time difference between HST and CST may temporarily change by one hour, which can cause confusion for scheduled meetings or calls. It's important to double-check your conversions around transition dates, especially if the two timezones switch on different dates. Check our DST change calendar for exact transition dates in the current year.

Do HST and CST ever have the same time?

No, HST and CST never show the same time because their base UTC offsets are different. However, because CST observes daylight saving time and HST does not, the time difference between them changes by one hour during DST transitions. This means the gap narrows or widens depending on the season, but the two clocks never align. Always verify the current offset around DST transition dates to avoid scheduling errors.

HST to CST Converter

Convert Hawaii Standard Time to Central Standard Time. See the hour-by-hour conversion table below.

Timezone Details

Hawaii Standard Time

12:09 PM

Thursday, April 2, 2026

HST (UTC-10:00)

Central Standard Time

5:09 PM

Thursday, April 2, 2026

CDT (UTC-05:00)

Difference: +5 hours

HST DST: No

CDT DST: Yes (CDT)

24-Hour Overview

HST — 24-hour overview

12a12a

3a3a

6a6a

9a9a

10a

11a

12p12p

3p3p

6p6p

9p9p

10p

11p

NightMorningBusinessEvening

CDT — 24-hour overview

5a5a

8a8a

10a

11a11a

12p

2p2p

5p5p

8p8p

10p

11p11p

12a

2a2a

NightMorningBusinessEvening

Frequently Asked Questions

Related Conversions

CST to HST CST to EST EST to CST CST to PST PST to CST CST to GMT GMT to CST CST to IST IST to CST

Cities in These Timezones

HST Cities

Honolulu

CST Cities

Chicago Houston Dallas Minneapolis

More Tools

Compare HST & CST Plan a Meeting (HST & CST)See on Map

Learn More

How Time Zones Work Understanding DST Timezone Abbreviations

External Resources

Hawaii Standard Time on Wikipedia Central Standard Time on Wikipedia IANA Time Zone Database