Convert Japan Standard Time to Hawaii Standard Time
Instantly convert Japan Standard Time (JST) to Hawaii Standard Time (HST) with our free online calculator.
Japan Standard Time
02:20:52 PM
Wed, Jun 24 (JST)
Hawaii Standard Time
07:20:52 PM
Tue, Jun 23 (HST)
Convert a Specific Time
24-Hour Comparison
| JST | HST |
|---|---|
| 12:00 AM | 5:00 AM(-1d) |
| 1:00 AM | 6:00 AM(-1d) |
| 2:00 AM | 7:00 AM(-1d) |
| 3:00 AM | 8:00 AM(-1d) |
| 4:00 AM | 9:00 AM(-1d) |
| 5:00 AM | 10:00 AM(-1d) |
| 6:00 AM | 11:00 AM(-1d) |
| 7:00 AM | 12:00 PM(-1d) |
| 8:00 AM | 1:00 PM(-1d) |
| 9:00 AM | 2:00 PM(-1d) |
| 10:00 AM | 3:00 PM(-1d) |
| 11:00 AM | 4:00 PM(-1d) |
| 12:00 PM | 5:00 PM(-1d) |
| 1:00 PM | 6:00 PM(-1d) |
| 2:00 PM | 7:00 PM(-1d) |
| 3:00 PM | 8:00 PM(-1d) |
| 4:00 PM | 9:00 PM(-1d) |
| 5:00 PM | 10:00 PM(-1d) |
| 6:00 PM | 11:00 PM(-1d) |
| 7:00 PM | 12:00 AM |
| 8:00 PM | 1:00 AM |
| 9:00 PM | 2:00 AM |
| 10:00 PM | 3:00 AM |
| 11:00 PM | 4:00 AM |
How to Convert Japan Standard Time to Hawaii Standard Time
Formula
To convert Japan Standard Time (JST) to Hawaii Standard Time (HST): Convert JST to HST
About Japan Standard Time (JST)
Japan Standard Time (JST, IANA: Asia/Tokyo) is the civil time of Japan, set at UTC+9:00 year-round (no DST). Japan observed Daylight Saving Time only briefly during American Occupation (1948-1951) and discontinued it after the Treaty of San Francisco. JST is also called Nippon Hyōjunji (日本標準時) and is officially maintained by the National Institute of Information and Communications Technology (NICT) — Japan operates a sophisticated atomic-clock-based timekeeping system at NICT Koganei facility with caesium beam frequency standards CSF-2 + Sr-87 optical lattice clock. JST is identical in offset to Korea Standard Time (KST), Yakutsk Time (Russian Far East), Western Indonesian Time WIT (eastern Indonesia), and Palau Time (PWT). JST serves Japan's approximately 125 million residents across 47 prefectures. Major JST cities: Tokyo (14M city, 37M metro — the world's largest metropolitan area by population), Yokohama (3.8M — Tokyo bay metro), Osaka (2.7M, Kansai region 19M metro), Nagoya (2.3M, Chukyo region 9.5M metro), Sapporo (1.9M — Hokkaido capital), Fukuoka (1.6M — Kyushu hub), Kobe (1.5M), Kawasaki (1.5M), Saitama (1.3M). Affects: TSE (Tokyo Stock Exchange) trading hours 09:00-15:00 JST, Tokyo Sumo Grand Tournaments, Shinkansen bullet-train scheduling, Tokyo Disney + USJ park operating hours.
About Hawaii Standard Time (HST)
Hawaii Standard Time (HST, IANA: Pacific/Honolulu) is the time zone for the State of Hawaii and the Aleutian Islands of Alaska west of 169.5°W. HST is UTC-10:00 year-round and does not observe Daylight Saving Time per Hawaii Revised Statutes §1-31 (Hawaii opted out of the Uniform Time Act of 1966). When the US mainland switches to Daylight Saving Time in March, the offset from Hawaii to the West Coast (Pacific Time) becomes 3 hours instead of the standard 2 hours. Honolulu sees solar noon at approximately 12:30 PM HST in summer. HST is the same offset as Cook Island Time (CKT) and Tahiti Time (TAHT) in French Polynesia, allowing easy mental conversion across the central Pacific. Time-sensitive activities affected by HST include Pacific tsunami warning system coordination per NOAA NTWC, US military operations from Joint Base Pearl Harbor-Hickam, and the Mauna Kea astronomical observatories' nightly observing schedules.