HST to ICT Converter
ICT is 17 hours ahead of HST
HST to ICT Conversion Table
Green rows indicate standard business hours (9 AM – 5 PM) in ICT
| HST | ICT |
|---|---|
| 12:00 AM | 5:00 PM |
| 1:00 AM | 6:00 PM |
| 2:00 AM | 7:00 PM |
| 3:00 AM | 8:00 PM |
| 4:00 AM | 9:00 PM |
| 5:00 AM | 10:00 PM |
| 6:00 AM | 11:00 PM |
| 7:00 AM | 12:00 AM +1d |
| 8:00 AM | 1:00 AM +1d |
| 9:00 AM | 2:00 AM +1d |
| 10:00 AM | 3:00 AM +1d |
| 11:00 AM | 4:00 AM +1d |
| 12:00 PM | 5:00 AM +1d |
| 1:00 PM | 6:00 AM +1d |
| 2:00 PM | 7:00 AM +1d |
| 3:00 PM | 8:00 AM +1d |
| 4:00 PM | 9:00 AM +1d |
| 5:00 PM | 10:00 AM +1d |
| 6:00 PM | 11:00 AM +1d |
| 7:00 PM | 12:00 PM +1d |
| 8:00 PM | 1:00 PM +1d |
| 9:00 PM | 2:00 PM +1d |
| 10:00 PM | 3:00 PM +1d |
| 11:00 PM | 4:00 PM +1d |
Converting Hawaii Standard Time to Indochina Time
Hawaii Standard Time (HST) and Indochina Time (ICT) are separated by a 17 hours time difference. ICT is 17 hours ahead of HST. HST is UTC-10, used in United States, while ICT is UTC+7, used in Thailand, Vietnam, Cambodia.
When converting from HST to ICT, the key reference points to remember are: 9:00 AM HST equals 2:00 AM ICT, 12:00 PM noon HST equals 5:00 AM ICT, and 5:00 PM HST equals 10:00 AM ICT. The conversion table above shows every hour of the day mapped between these two time zones.
Scheduling Across HST and ICT
For professionals scheduling meetings between HST and ICT, finding overlapping business hours is essential. Standard business hours are typically 9:00 AM to 5:00 PM in each time zone. Given the 17 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
HST does not observe Daylight Saving Time, maintaining UTC-10 year-round. ICT does not observe DST, staying at UTC+7 year-round.