Convert HST to AST — Time Difference Between Hawaii Standard Time and Arabia Standard Time

How to Convert HST to AST

Drag the slider on the HST timeline to pick your time — the AST time updates instantly. You can also click the time display to type a specific hour or pick one from the 15-minute interval dropdown, and use the date picker to check a different day.

What Is the Time Difference Between HST and AST?

Arabia Standard Time (AST) is 13 hours ahead of Hawaii Standard Time (HST). To convert, add 13 hours — for example, 9:00 AM HST is 10:00 PM AST.

HST to AST Quick Reference

HST to AST Meeting Planner

Use the color-coded table above to find overlapping work hours between Honolulu and Riyadh. Amber rows mark daytime hours — pick a slot that falls in amber on both sides for a meeting that works for everyone.

Why Trust This HST to AST Converter?

Timezoney uses the IANA Time Zone Database — the same source that powers your phone and computer — so every conversion handles daylight saving transitions and half-hour offsets automatically.