TimeToZone

UTC to HST Converter

HST is 10 hours behind UTC. 9:00 AM UTC = 11:00 PM HST (previous day).

⇄ Swap
UTCfrom
Coordinated Universal Time
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HST
Hawaii-Aleutian Standard Time
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HST is 10 hours behind UTC. To convert UTC to HST, subtract 10 hours from the UTC time: 9:00 AM UTC = 11:00 PM HST (previous day).

UTC (UTC) is used in The world's time standard; used in aviation, computing and science. HST (Hawaii-Aleutian Time) is used in Hawaii (all year, no daylight saving time).

UTC to HST time conversion table

UTC to HST on 6 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.

UTCHSTDay
12:00 AM UTC2:00 PM HSTprevious day
1:00 AM UTC3:00 PM HSTprevious day
2:00 AM UTC4:00 PM HSTprevious day
3:00 AM UTC5:00 PM HSTprevious day
4:00 AM UTC6:00 PM HSTprevious day
5:00 AM UTC7:00 PM HSTprevious day
6:00 AM UTC8:00 PM HSTprevious day
7:00 AM UTC9:00 PM HSTprevious day
8:00 AM UTC10:00 PM HSTprevious day
9:00 AM UTC11:00 PM HSTprevious day
10:00 AM UTC12:00 AM HSTnight
11:00 AM UTC1:00 AM HSTnight
12:00 PM UTC2:00 AM HSTnight
1:00 PM UTC3:00 AM HSTnight
2:00 PM UTC4:00 AM HSTnight
3:00 PM UTC5:00 AM HSTnight
4:00 PM UTC6:00 AM HST—
5:00 PM UTC7:00 AM HST—
6:00 PM UTC8:00 AM HST—
7:00 PM UTC9:00 AM HST—
8:00 PM UTC10:00 AM HST—
9:00 PM UTC11:00 AM HST—
10:00 PM UTC12:00 PM HST—
11:00 PM UTC1:00 PM HST—
  • Work rows — 9 AM–5 PM in both places
  • Night in the destination (10 PM–6 AM)

How to convert UTC to HST

Subtract 10 hours from the UTC time to get HST.

Example: 9:00 AM UTC = 11:00 PM HST (previous day).

Across midnight: 1:00 AM UTC = 3:00 PM HST (previous day). The date changes, so always check the day as well as the hour.

Time difference between UTC and HST

The time difference between UTC and HST is 10 hours all year – HST is behind UTC.

UTC and HST during daylight saving time

  • UTC does not observe daylight saving time; it stays on UTC+0 all year.
  • HST does not observe daylight saving time; it stays on UTC−10 all year.

Best time for a meeting between UTC and HST

UTC and HST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM UTC, which is 9:00 PM HST.

Plan a meeting across more time zones.

UTC to HST FAQ

What is the time difference between UTC and HST?

HST is 10 hours behind UTC all year. 9:00 AM UTC = 11:00 PM HST (previous day).

What is 9 AM UTC in HST?

9:00 AM UTC is 11:00 PM HST (previous day).

What is 12 PM (noon) UTC in HST?

12:00 PM UTC is 2:00 AM HST.

Is HST ahead of or behind UTC?

HST is 10 hours behind UTC, so it is earlier in HST than in UTC.

Does UTC change for daylight saving time?

No. UTC stays on the same offset all year, so conversions never shift for daylight saving time.

Does HST change for daylight saving time?

No. HST stays on the same offset all year, so conversions never shift for daylight saving time.

What is the best time for a meeting between UTC and HST?

UTC and HST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM UTC, which is 9:00 PM HST.

Related conversions

Convert HST to UTC

Convert UTC to other time zones

Convert other time zones to HST

Learn more

Updated 6 November 2026. Time zone data: IANA tz database.