Clockjumper

Timezone conversion

HST to CST Time — Convert Hawaii Standard Time to Central Standard Time (US)

CST is currently 5 hours ahead of HST. The gap shifts across the year: around January CST is 4 hours ahead of HST, and around July it is 5 hours ahead of HST, because one or both zones observe daylight saving.

CST is currently 5 hours ahead of HST.

HST • HST (UTC-10)
4:32 AM
Thursday, Sep 10
CST • CDT (UTC-5)
9:32 AM
Thursday, Sep 10

Abbreviation disambiguation

Hawaii Standard Time is UTC−10 year-round. Hawaii does not observe daylight saving time.

On Clockjumper, CST refers to US Central Standard Time (UTC−6). The same three letters are also used for China Standard Time (UTC+8) and Cuba Standard Time (UTC−5) — check the city or UTC offset to be sure which is meant.

Interactive converter

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Full HST to CST conversion table

HSTCST
12:00 AM5:00 AM
1:00 AM6:00 AM
2:00 AM7:00 AM
3:00 AM8:00 AM
4:00 AM9:00 AM
5:00 AM10:00 AM
6:00 AM11:00 AM
7:00 AM12:00 PM
8:00 AM1:00 PM
9:00 AM2:00 PM
10:00 AM3:00 PM
11:00 AM4:00 PM
12:00 PM5:00 PM
1:00 PM6:00 PM
2:00 PM7:00 PM
3:00 PM8:00 PM
4:00 PM9:00 PM
5:00 PM10:00 PM
6:00 PM11:00 PM
7:00 PM12:00 AM(next day)
8:00 PM1:00 AM(next day)
9:00 PM2:00 AM(next day)
10:00 PM3:00 AM(next day)
11:00 PM4:00 AM(next day)

Daylight saving and how the gap changes

Around January CST is 4 hours ahead of HST. Around July it is 5 hours ahead of HST. That swing comes from one or both zones observing daylight saving on different schedules — the converter above always reflects the correct offset for the date you pick.

Frequently asked questions

Is CST ahead of or behind HST right now?
CST is currently 5 hours ahead of HST.
What is the current HST to CST time difference?
Right now the gap is 5 hours — CST is 5 hours ahead of HST.
Does the HST → CST offset change during the year?
Yes. Around January CST is 4 hours ahead of HST; around July it is 5 hours ahead of HST. The converter above always reflects the correct offset for the date you pick.
Does HST observe daylight saving time?
No — Hawaii Standard Time stays at a fixed UTC offset year-round.
Does CST observe daylight saving time?
CST is itself the standard-time form. Central Standard Time (US) is in force at UTC-6 through the winter months; outside that window the same zone is on CDT (UTC-5).
What time is 3 AM HST in CST?
3:00 AM HST is 8:00 AM CST.
What time is 8 AM HST in CST?
8:00 AM HST is 1:00 PM CST.
What time is 9 AM HST in CST?
9:00 AM HST is 2:00 PM CST.
What time is 10 AM HST in CST?
10:00 AM HST is 3:00 PM CST.
What time is 11 AM HST in CST?
11:00 AM HST is 4:00 PM CST.
What time is 12 PM (noon) HST in CST?
12:00 PM HST is 5:00 PM CST.
What time is 2 PM HST in CST?
2:00 PM HST is 7:00 PM CST.
What time is 3 PM HST in CST?
3:00 PM HST is 8:00 PM CST.
What time is 4 PM HST in CST?
4:00 PM HST is 9:00 PM CST.
What time is 5 PM HST in CST?
5:00 PM HST is 10:00 PM CST.
What time is 9 PM HST in CST?
9:00 PM HST is 2:00 AM (next day) CST.
What time is 10 PM HST in CST?
10:00 PM HST is 3:00 AM (next day) CST.
When is the best time to schedule a call between HST and CST?
The working-hours overlap (09:00–17:00 in both zones) runs roughly 9:00 AM – 12:00 PM HST (≈ 3 hours). The midpoint of that window — 10:30 AM HST, 3:30 PM CST — is the safest single slot to propose for a live call.
What time zone does HST refer to?
HST refers to Hawaii Standard Time (IANA: Pacific/Honolulu).
What time zone does CST refer to?
CST refers to Central Standard Time (US) (IANA: America/Chicago).
Is HST on this page the same as other zones that share the letters "HST"?
Hawaii Standard Time is UTC−10 year-round. Hawaii does not observe daylight saving time.
Is CST on this page the same as other zones that share the letters "CST"?
On Clockjumper, CST refers to US Central Standard Time (UTC−6). The same three letters are also used for China Standard Time (UTC+8) and Cuba Standard Time (UTC−5) — check the city or UTC offset to be sure which is meant.

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