When to ring Saint Helena (+290)
Saint Helena runs on Greenwich Mean Time — UTC+0 year-round. Government and maritime contacts in Jamestown are reachable 8 AM–4 PM GMT.
GMT (UTC+0), at a glance.
Saint Helena observes Greenwich Mean Time at UTC+0 all year with no daylight saving. Jamestown is the only significant settlement.
Saint Helena against the world's hubs.
Saint Helena is in sync with London in winter (1 h behind during UK summer BST), 5 h ahead of New York and 2 h behind Cape Town.
Understanding the time difference between the United States and Saint Helena
Time zone differences across other major countries
Why timing matters for calls to Saint Helena.
Saint Helena's government offices and the airport authority operate on GMT with very short staffing hours. The 8–11 AM window is the only reliable slot for reaching Jamestown contacts.
The best windows to reach Saint Helena.
8 AM–11 AM GMT for government and airport contacts. Avoid Tuesday afternoons when the island's sole flight (from Johannesburg) arrives and staff are tied up.
Saint Helena runs at UTC
The zone is Atlantic/St_Helena. 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 Saint Helena.
No daylight saving
Saint Helena stays on UTC all year. The windows below only move when the caller's own country changes its clocks, not when Saint Helena does.
Shared hours with 3 of 5 markets
Callers in New York, London, Mumbai share part of the working day with Saint Helena. The table above gives the exact intersection for each.
Where the gap is too wide
There is no 9-to-5 overlap with Los Angeles, Sydney. Calling Saint Helena from those cities means someone is working outside normal hours — worth saying so when you book the call.
How to call Saint Helena using the +290 code.
Dial +290 then the five-digit local number. Ringflow routes via South Atlantic satellite infrastructure for consistent quality to Jamestown.
Number anatomy
Dial exit code
Press + on mobile or 00 from most landlines. This opens an international line.
Enter +290
Saint Helena's international code. Every call to Saint Helena must start with +290.
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 Saint Helena contacts in their window, on the right network.
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When your working day overlaps Saint Helena
Callers in New York, London and Mumbai share part of the working day with Saint Helena. There is no shared working window with Los Angeles and Sydney.
| Calling from | Saint Helena is | Call at (your time) | Which is (their time) |
|---|---|---|---|
| New York | 5h ahead | 9:00 AM – 12:00 PM | 2:00 PM – 5:00 PM |
| Los Angeles | 8h ahead | No shared working hours — you would need to call outside 9am-5pm | |
| London | same time | 9:00 AM – 5:00 PM | 9:00 AM – 5:00 PM |
| Mumbai | 5h 30m behind | 2:30 PM – 5:00 PM | 9:00 AM – 11:30 AM |
| Sydney | 11h 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 Saint Helena'sstandard-time offset of UTC. Saint Helena does not observe daylight saving, so these windows hold all year — though they shift when the caller's own country changes its clocks.
FAQ
Calling Saint Helena, answered.
Time zone, daylight saving and dialling questions for Saint Helena (+290).