UTC to HST Converter
HST is 10 hours behind UTC
UTC to HST Conversion Table
Green rows indicate standard business hours (9 AM – 5 PM) in HST
| UTC | HST |
|---|---|
| 12:00 AM | 2:00 PM -1d |
| 1:00 AM | 3:00 PM -1d |
| 2:00 AM | 4:00 PM -1d |
| 3:00 AM | 5:00 PM -1d |
| 4:00 AM | 6:00 PM -1d |
| 5:00 AM | 7:00 PM -1d |
| 6:00 AM | 8:00 PM -1d |
| 7:00 AM | 9:00 PM -1d |
| 8:00 AM | 10:00 PM -1d |
| 9:00 AM | 11:00 PM -1d |
| 10:00 AM | 12:00 AM |
| 11:00 AM | 1:00 AM |
| 12:00 PM | 2:00 AM |
| 1:00 PM | 3:00 AM |
| 2:00 PM | 4:00 AM |
| 3:00 PM | 5:00 AM |
| 4:00 PM | 6:00 AM |
| 5:00 PM | 7:00 AM |
| 6:00 PM | 8:00 AM |
| 7:00 PM | 9:00 AM |
| 8:00 PM | 10:00 AM |
| 9:00 PM | 11:00 AM |
| 10:00 PM | 12:00 PM |
| 11:00 PM | 1:00 PM |
Converting Coordinated Universal Time to Hawaii Standard Time
Coordinated Universal Time (UTC) and Hawaii Standard Time (HST) are separated by a 10 hours time difference. HST is 10 hours behind UTC. UTC is UTC+0, while HST is UTC-10, used in United States.
When converting from UTC to HST, the key reference points to remember are: 9:00 AM UTC equals 11:00 PM HST, 12:00 PM noon UTC equals 2:00 AM HST, and 5:00 PM UTC equals 7:00 AM HST. The conversion table above shows every hour of the day mapped between these two time zones.
Scheduling Across UTC and HST
For professionals scheduling meetings between UTC and HST, finding overlapping business hours is essential. Standard business hours are typically 9:00 AM to 5:00 PM in each time zone. Given the 10 hours difference, the window of overlap may be limited, making early morning or late evening calls necessary for one party. Use the highlighted working hours in the conversion table above to quickly identify suitable meeting times.
Daylight Saving Time Considerations
UTC does not observe Daylight Saving Time, maintaining UTC+0 year-round. HST does not observe DST, staying at UTC-10 year-round.