Convert Hawaii Standard Time to India Standard Time
Instantly convert Hawaii Standard Time (HST) to India Standard Time (IST) with our free online calculator.
Hawaii Standard Time
07:20:49 PM
Tue, Jun 23 (HST)
India Standard Time
10:50:49 AM
Wed, Jun 24 (IST)
Convert a Specific Time
24-Hour Comparison
| HST | IST |
|---|---|
| 12:00 AM | 3.5:00 PM |
| 1:00 AM | 4.5:00 PM |
| 2:00 AM | 5.5:00 PM |
| 3:00 AM | 6.5:00 PM |
| 4:00 AM | 7.5:00 PM |
| 5:00 AM | 8.5:00 PM |
| 6:00 AM | 9.5:00 PM |
| 7:00 AM | 10.5:00 PM |
| 8:00 AM | 11.5:00 PM |
| 9:00 AM | 0.5:00 AM(+1d) |
| 10:00 AM | 1.5:00 AM(+1d) |
| 11:00 AM | 2.5:00 AM(+1d) |
| 12:00 PM | 3.5:00 AM(+1d) |
| 1:00 PM | 4.5:00 AM(+1d) |
| 2:00 PM | 5.5:00 AM(+1d) |
| 3:00 PM | 6.5:00 AM(+1d) |
| 4:00 PM | 7.5:00 AM(+1d) |
| 5:00 PM | 8.5:00 AM(+1d) |
| 6:00 PM | 9.5:00 AM(+1d) |
| 7:00 PM | 10.5:00 AM(+1d) |
| 8:00 PM | 11.5:00 AM(+1d) |
| 9:00 PM | 0.5:00 PM(+1d) |
| 10:00 PM | 1.5:00 PM(+1d) |
| 11:00 PM | 2.5:00 PM(+1d) |
How to Convert Hawaii Standard Time to India Standard Time
Formula
To convert Hawaii Standard Time (HST) to India Standard Time (IST): Convert HST to IST
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.
About India Standard Time (IST)
India Standard Time (IST, IANA: Asia/Kolkata) is the civil time of the Republic of India and Sri Lanka, set at UTC+5:30 — one of the world's most populous 30-minute-offset time zones. India does not observe Daylight Saving Time per the Government of India directive (a brief DST trial in 1942-1945 during WWII was discontinued; subsequent proposals from 2010-2017 were rejected by the Indian Government citing minimal energy savings + agricultural sector disruption). IST is defined as the local mean solar time at 82.5°E longitude (passing through Shankargarh fort in Uttar Pradesh, with the reference clock at the National Physical Laboratory in New Delhi per the Indian Institute of Astrophysics). The 30-minute offset is preserved because India's east-west extent (68°E to 97°E) spans ~28° of longitude — approximately 2 hours of solar time — and the central meridian is most representative for a single unified zone. IST serves approximately 1.4 billion people in India + 22 million in Sri Lanka (Sri Lanka observes SLST = UTC+5:30, identical to IST). Major cities: Mumbai (12.5M), Delhi (16.8M, NCR 29M), Bengaluru (8.4M), Hyderabad (10M), Chennai (7M), Kolkata (4.5M), Ahmedabad (5.5M), Pune (3.1M). Affects: BSE/NSE stock exchanges, IPL Indian Premier League cricket schedules.