World Timezones

HST to AST Converter

Compare AST to HST instead
Hawaii Time6:35 pmThu, Jun 4
Hawaii TimeHST
North America · UTC-10
6:35 pmThu, Jun 4
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
Arabia Standard TimeAST
Middle East · UTC+3
7:35 amFri, Jun 5
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p

Offset

The time difference between Hawaii Time and Arabia Standard Time is 13 hours.

13 hours

Hawaii Time (HST) is behind Arabia Standard Time (AST).

HST: UTC-10

AST: UTC+3

Neither Hawaii Time nor Arabia Standard Time is currently observing daylight saving time.

When to schedule

Standard business hours (9 AM–5 PM, Mon–Fri) in Hawaii Time and Arabia Standard Time don't overlap on the same weekday. Arabia Standard Time is 13 hours ahead of Hawaii Time.

With some flexibility, there’s a workable window outside standard hours:

  • 6 PM–8 PM in Hawaii Time (7 AM–9 AM the next day in Arabia Standard Time) — suggest 7:00 PM Hawaii Time (8:00 AM Arabia Standard Time).

This means an early start or late finish for one side, but it’s a reasonable slot for a one-off meeting.

Note: the working week in Saudi Arabia runs Sunday–Thursday; Friday–Saturday is the weekend, so overlap on those days is limited.

Public holidays in 2026

National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.

United States

  • New Year's DayThu, Jan 1
  • Martin Luther King, Jr. DayMon, Jan 19
  • Presidents DayMon, Feb 16
  • Memorial DayMon, May 25
  • Juneteenth National Independence DayFri, Jun 19
  • Independence DayFri, Jul 3
  • Labour DayMon, Sep 7
  • Columbus DayMon, Oct 12
  • Veterans DayWed, Nov 11
  • Thanksgiving DayThu, Nov 26
  • Christmas DayFri, Dec 25

About these zones

Hawaii Time is also known as HST. To call United States, dial +1.

Arabia Standard Time is also known as AST. To call Saudi Arabia, dial +966.

Arabia Standard Time is approximately 8,850 miles northwest of Hawaii Time.

Quick reference

Full 24-hour conversion table — tap any time to open it in the converter.

HSTASTDay
12:00 am1:00 pmSame day
1:00 am2:00 pmSame day
2:00 am3:00 pmSame day
3:00 am4:00 pmSame day
4:00 am5:00 pmSame day
5:00 am6:00 pmSame day
6:00 am7:00 pmSame day
7:00 am8:00 pmSame day
8:00 am9:00 pmSame day
9:00 am10:00 pmSame day
10:00 am11:00 pmSame day
11:00 am12:00 am+1 day
12:00 pm1:00 am+1 day
1:00 pm2:00 am+1 day
2:00 pm3:00 am+1 day
3:00 pm4:00 am+1 day
4:00 pm5:00 am+1 day
5:00 pm6:00 am+1 day
6:00 pm7:00 am+1 day
7:00 pm8:00 am+1 day
8:00 pm9:00 am+1 day
9:00 pm10:00 am+1 day
10:00 pm11:00 am+1 day
11:00 pm12:00 pm+1 day

Daylight saving time

Neither Hawaii Time nor Arabia Standard Time observes daylight saving time. The offset between these zones remains constant year-round.

See the daylight saving time page for transition dates across every time zone.

Daylight today

Hawaii Time
Sunrise
5:50 AM
Sunset
7:12 PM
Day length
13h 22m
Arabia Standard Time
Sunrise
5:05 AM
Sunset
6:41 PM
Day length
13h 36m

Daylight overlap: 3h 7m — 4:05 PM–7:12 PM in Hawaii Time (5:05 AM–8:12 AM in Arabia Standard Time). Both locations are in daylight during this window.

Cities in these zones

Cities in Hawaii Time

Cities in Arabia Standard Time

Browse all cities to see the current local time anywhere.

Airports in these zones

Airports in Hawaii Time

  • HNL

Airports in Arabia Standard Time

  • JED
  • RUH
  • MED
  • DMM

Related conversions

Common conversions

What is 9:00 am HST in AST?
9:00 am HST is 10:00 pm AST.
What is 12:00 pm HST in AST?
12:00 pm HST is 1:00 am AST, the next day.
What is 12:30 pm HST in AST?
12:30 pm HST is 1:30 am AST, the next day.
What is 2:00 pm HST in AST?
2:00 pm HST is 3:00 am AST, the next day.
What is 5:00 pm HST in AST?
5:00 pm HST is 6:00 am AST, the next day.
What is 11:30 pm HST in AST?
11:30 pm HST is 12:30 pm AST, the next day.