Right time to call U.S. Virgin Islands (+1-340)
The USVI runs on Atlantic Standard Time — UTC−4 year-round. Tourism and rum industry contacts in Charlotte Amalie are reachable 9 AM–5 PM AST.
AST (UTC−4), at a glance.
The US Virgin Islands observes Atlantic Standard Time all year with no daylight saving. Charlotte Amalie on St Thomas and Christiansted on St Croix share UTC−4.
USVI against the world's hubs.
The USVI is 4 h behind London, in sync with Halifax, and 1 h ahead of New York. Miami callers overlap completely with Charlotte Amalie's business hours all year.
Understanding the time difference between the United States and U.S. Virgin Islands
Time zone differences across other major countries
Why timing matters for calls to the USVI.
USVI's rum distillery, yacht charter and tourism contacts keep standard US-style hours. The 9–11 AM AST window catches procurement and marina contacts before the afternoon charter fleet heads out.
The best windows to reach the US Virgin Islands.
9 AM–12 PM AST for tourism, duty-free and rum industry contacts; 2 PM–4 PM for legal and financial services on St Croix. Cruise ship days (typically Tuesday, Thursday) swamp Charlotte Amalie from 9 AM onward.
U.S. Virgin Islands runs at -04:00
The zone is America/St_Thomas. Every window on this page is worked out from that offset rather than a rule of thumb, so the times shown are the ones that actually apply to U.S. Virgin Islands.
No daylight saving
U.S. Virgin Islands stays on -04:00 all year. The windows below only move when the caller's own country changes its clocks, not when U.S. Virgin Islands does.
Shared hours with 3 of 5 markets
Callers in New York, Los Angeles, London share part of the working day with U.S. Virgin Islands. The table above gives the exact intersection for each.
Where the gap is too wide
There is no 9-to-5 overlap with Mumbai, Sydney. Calling U.S. Virgin Islands from those cities means someone is working outside normal hours — worth saying so when you book the call.
How to call the US Virgin Islands using the +1-340 code.
Dial +1-340 then the seven-digit local number. Ringflow's NANP routing connects to Charlotte Amalie on Caribbean DID infrastructure.
Number anatomy
Dial exit code
Press + on mobile or 00 from most landlines. This opens an international line.
Enter +1-340
U.S. Virgin Islands's international code. Every call to U.S. Virgin Islands must start with +1-340.
Area prefix
Add the local area or mobile network code — always drop any leading zero used for domestic calls.
Full number
Dial the remaining subscriber digits. Your number is now correctly formatted for international routing.
Best time to call — every country.
Jump to any country's best-time-to-call guide. Search by name, ISO or dial prefix.
Reach US Virgin Islands contacts in their window, on the right network.
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When your working day overlaps U.S. Virgin Islands
Callers in New York, Los Angeles and London share part of the working day with U.S. Virgin Islands. There is no shared working window with Mumbai and Sydney.
| Calling from | U.S. Virgin Islands is | Call at (your time) | Which is (their time) |
|---|---|---|---|
| New York | 1h ahead | 9:00 AM – 4:00 PM | 10:00 AM – 5:00 PM |
| Los Angeles | 4h ahead | 9:00 AM – 1:00 PM | 1:00 PM – 5:00 PM |
| London | 4h behind | 1:00 PM – 5:00 PM | 9:00 AM – 1:00 PM |
| Mumbai | 9h 30m behind | No shared working hours — you would need to call outside 9am-5pm | |
| Sydney | 15h behind | No shared working hours — you would need to call outside 9am-5pm | |
Windows are the intersection of a 9am-5pm working day in each place,
using U.S. Virgin Islands’s standard-time offset of -04:00. U.S. Virgin Islands does not observe daylight saving, so these windows hold all year — though they shift when the caller's own country changes its clocks.