Shanghai GuantanamoTime Converter
Shanghai (GMT+8, UTC+8) is currently 12 hours ahead of Guantanamo (GMT-4, 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 Guantanamo.
Shanghai (GMT+8) runs 12 hours ahead of Guantanamo (GMT-4). 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
- Guantanamo
- UTC−4
- Best call window
- Outside 9–6
Shanghai to Guantanamo conversion table
The next 12 hours in Shanghai and the matching local time in Guantanamo. The current hour is highlighted; drag the converter's slider and the table follows.
| Shanghai · GMT+8 | Guantanamo · GMT-4 |
|---|---|
| NOW Mon, Jul 27 |
Sun, Jul 26 |
Mon, Jul 27 |
Sun, Jul 26 |
Mon, Jul 27 |
Mon, Jul 27 |
Mon, Jul 27 |
Mon, Jul 27 |
Mon, Jul 27 |
Mon, Jul 27 |
Mon, Jul 27 |
Mon, Jul 27 |
Mon, Jul 27 |
Mon, Jul 27 |
Mon, Jul 27 |
Mon, Jul 27 |
Mon, Jul 27 |
Mon, Jul 27 |
Mon, Jul 27 |
Mon, Jul 27 |
Mon, Jul 27 |
Mon, Jul 27 |
Mon, Jul 27 |
Mon, Jul 27 |
Best time to meet between Shanghai & Guantanamo
Working hours are 9am–6pm in each city. The bright band is where they overlap: both sides at their desks.
Daylight saving shifts this gap by up to 1 hour
The difference between Shanghai and Guantanamo swings between 13 and 12 hours across the year as each side starts or ends daylight saving. Shanghai does not observe daylight saving time. Clocks in Guantanamo move back 1 hour to UTC−5 (UTC−5) on Sunday, November 1, 2026. 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 Guantanamo
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 Guantanamo?", 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 time zone identifiers and every possible offset
- Live times in <time datetime> elements with explicit UTC offsets
{
"pair": "Shanghai → Guantanamo",
"url": "https://worldclock.pro/en/convert/shanghai-to-guantanamo",
"from": {
"name": "Shanghai",
"type": "city",
"abbreviation": "GMT+8",
"daylightAbbreviation": null,
"iana": "Asia/Shanghai",
"standardUtcOffset": "+08:00",
"daylightUtcOffset": null,
"referenceCity": "Shanghai"
},
"to": {
"name": "Guantanamo",
"type": "city",
"abbreviation": "GMT-4",
"daylightAbbreviation": null,
"iana": "America/Havana",
"standardUtcOffset": "-05:00",
"daylightUtcOffset": "-04:00",
"referenceCity": "Guantanamo"
},
"currentDifferenceMinutes": -720,
"possibleDifferencesMinutes": [
-780,
-720
],
"note": "Between the regions that use these zones the difference is 13 and 12 hours across the year, depending on daylight saving on each side. The clocks on this page show the named zones themselves, which are fixed."
}
Frequently asked questions
What is the time difference between Shanghai and Guantanamo?
Shanghai is currently 12 hours ahead of Guantanamo. Shanghai is on GMT+8 (UTC+8) and Guantanamo is on GMT-4 (UTC−4). The difference can change when either side starts or ends daylight saving time.
Is Guantanamo ahead of or behind Shanghai?
Guantanamo is currently 12 hours behind Shanghai.
When it is 9:00 AM in Shanghai, what time is it in Guantanamo?
When it is 9:00 AM on a Monday in Shanghai, it is 9:00 PM the previous day in Guantanamo.
Do Shanghai and Guantanamo observe daylight saving time?
Shanghai does not observe daylight saving time. Clocks in Guantanamo move back 1 hour to UTC−5 (UTC−5) on Sunday, November 1, 2026.
How do I convert Shanghai time to Guantanamo time?
Subtract 12 hours from any time in Shanghai to get the time in Guantanamo. This page's converter and 24-hour table do it automatically and stay correct through daylight-saving changes.
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