Shanghai CastriesTime Converter
Shanghai (GMT+8, UTC+8) is currently 12 hours ahead of Castries (AST, UTC−4). Compare live clocks, convert any hour, and find times to meet.
Quick answer
When it's in Shanghai, it's the previous day in Castries.
Shanghai (GMT+8) runs 12 hours ahead of Castries (AST). A 9-to-5 workday on one side lands in the other side's evening or night, so the two cities share almost no normal working hours — edge-of-day calls are the trick.
- Time difference
- −12h 00m
- Shanghai
- UTC+8
- Castries
- UTC−4
- Best call window
- Outside 9–6
Shanghai to Castries conversion table
The next 12 hours in Shanghai and the matching local time in Castries. The current hour is highlighted; drag the converter's slider and the table follows.
| Shanghai · GMT+8 | Castries · AST |
|---|---|
| NOW 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 |
Mon, Jun 22 |
Best time to meet between Shanghai & Castries
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. Shanghai does not observe daylight saving time. Castries does not observe daylight saving time. 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 Shanghai
To Castries
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 Shanghai time in Castries?", 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": "Shanghai → Castries",
"url": "https://worldclock.pro/en/convert/shanghai-to-castries",
"from": {
"name": "Shanghai",
"type": "city",
"abbreviation": "GMT+8",
"daylightAbbreviation": null,
"iana": "Asia/Shanghai",
"standardUtcOffset": "+08:00",
"daylightUtcOffset": null,
"referenceCity": "Shanghai"
},
"to": {
"name": "Castries",
"type": "city",
"abbreviation": "AST",
"daylightAbbreviation": null,
"iana": "America/St_Lucia",
"standardUtcOffset": "-04:00",
"daylightUtcOffset": null,
"referenceCity": "Castries"
},
"currentDifferenceMinutes": -720,
"possibleDifferencesMinutes": [
-720
],
"note": "The difference is constant year-round."
}
Frequently asked questions
What is the time difference between Shanghai and Castries?
Shanghai is currently 12 hours ahead of Castries. Shanghai is on GMT+8 (UTC+8) and Castries is on AST (UTC−4). The difference can change when either side starts or ends daylight saving time.
Is Castries ahead of or behind Shanghai?
Castries is currently 12 hours behind Shanghai.
When it is 9:00 AM in Shanghai, what time is it in Castries?
When it is 9:00 AM on a Monday in Shanghai, it is 9:00 PM the previous day in Castries.
Do Shanghai and Castries observe daylight saving time?
Shanghai does not observe daylight saving time. Castries does not observe daylight saving time.
How do I convert Shanghai time to Castries time?
Subtract 12 hours from any time in Shanghai to get the time in Castries. This page's converter and 24-hour table do it automatically and stay correct through daylight-saving changes.
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