Honolulu SingaporeHST to SGT Time Converter
Honolulu (HST, UTC−10) is currently 18 hours behind Singapore (SGT, UTC+8). Compare live clocks, convert any hour, and find times to meet.
Quick answer
When it's in Honolulu, it's the next day in Singapore.
Honolulu (HST) runs 18 hours behind Singapore (SGT). Both sides keep standard office hours with a real 9–6 overlap — the highlighted window below works for everyone.
- Time difference
- +18h 00m
- HST
- UTC−10
- SGT
- UTC+8
- Best call window
- 3:00 PM HST
HST to SGT conversion table
The next 12 hours in HST and the matching local time in SGT. The current hour is highlighted; drag the converter's slider and the table follows.
| HST | SGT |
|---|---|
| NOW Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Best time to meet between HST & SGT
Working hours are 9am–6pm in each city. The bright band is where they overlap — when both sides are at their desks.
This time difference never changes
Neither side observes daylight saving against the other, so the gap stays constant all year. This page always shows the live, DST-aware difference.
Related time zone conversions
Jump straight to another pair — every combination is a live tool, not an article.
From HST
To SGT
One source of truth — for you and your AI
This page exposes the same answer as structured data, so when you ask an assistant "what's 9am HST time in SGT?", it can cite the exact, DST-aware result — not a stale blog post.
- Schema.org JSON-LD on every converter page
- A machine-readable facts island with IANA zones and every possible offset
- Live times in <time datetime> elements with explicit UTC offsets
{
"pair": "HST → SGT",
"url": "https://worldclock.pro/en/convert/hst-to-sgt",
"from": {
"name": "HST",
"type": "timezone",
"abbreviation": "HST",
"daylightAbbreviation": null,
"iana": "Pacific/Honolulu",
"standardUtcOffset": "-10:00",
"daylightUtcOffset": null,
"referenceCity": "Honolulu"
},
"to": {
"name": "SGT",
"type": "timezone",
"abbreviation": "SGT",
"daylightAbbreviation": null,
"iana": "Asia/Singapore",
"standardUtcOffset": "+08:00",
"daylightUtcOffset": null,
"referenceCity": "Singapore"
},
"currentDifferenceMinutes": 1080,
"possibleDifferencesMinutes": [
1080
],
"note": "The difference is constant year-round."
}
Frequently asked questions
What is the time difference between HST and SGT?
HST is currently 18 hours behind SGT. HST is on HST (UTC−10) and SGT is on SGT (UTC+8). The difference can change when either side starts or ends daylight saving time.
Is SGT ahead of or behind HST?
SGT is currently 18 hours ahead of HST.
When it is 9:00 AM in HST, what time is it in SGT?
When it is 9:00 AM on a Monday in HST, it is 3:00 AM the next day in SGT.
Do HST and SGT observe daylight saving time?
HST does not observe daylight saving time. SGT does not observe daylight saving time.
How do I convert HST time to SGT time?
Add 18 hours to any time in HST to get the time in SGT. This page's converter and 24-hour table do it automatically and stay correct through daylight-saving changes.
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