Three numbers. The ones that decide the meeting.
When the world meets at work.
Read the day in both zones.
Crossing the border. Money, language, plugs.
Money changes hands at the border: Boston uses the USD ($) and Sofia uses the BGN (лв). Language shifts too — English in Boston, Bulgarian in Sofia. Cars drive on the right in both, so rentals feel familiar.
- Country
- United States
- Capital
- Washington, D.C.
- Currency
- United States dollar (USD · $)
- Language
- English
- Calling code
- +1
- Drives on
- Right
- Country
- Bulgaria
- Capital
- Sofia
- Currency
- Bulgarian lev (BGN · лв)
- Language
- Bulgarian
- Calling code
- +359
- Drives on
- Right
Quick answers. Before you book the call.
What's the time difference between Boston and Sofia?
Boston is 7 hours ahead of Sofia. Boston runs on GMT-4 and Sofia on GMT+3. The gap can shift by an hour when either side enters or leaves daylight saving — the live clocks above always reflect the current offset.
When's the best time to schedule a meeting?
There are 1 hour where both cities are inside a 09:00–17:00 workday. Aim for the middle of that window so neither side is starting or closing out.
Does daylight saving time change the difference?
Yes, if either city observes DST. When one side shifts and the other doesn't, the gap changes by one hour. The DST badges under each clock show whether each zone is currently shifted and when the next transition lands.
How far is Boston from Sofia?
About 7,278 km as the crow flies (great-circle distance). A non-stop commercial flight cruises that in roughly 9h 4m, not counting airport time, winds, or routing around restricted airspace.
Can I send this meeting time as a calendar invite?
Yes. Pick a time on the slider above, open the meeting card, customize the title and duration, then download the .ics file. It imports cleanly into Google Calendar, Outlook, and Apple Calendar with the correct timezone attached.
What currency do Boston and Sofia use?
Boston uses the United States dollar (USD, $); Sofia uses the Bulgarian lev (BGN, лв). Check the live rate before transferring money or paying with a card abroad — most banks add a 1–3 % FX margin on top of the mid-market rate.
How do I call Boston from Sofia?
Dial the international prefix used by your carrier (often 00), then +1, then the local number — drop any leading zero of the city or mobile code. For free calls, WhatsApp, Signal, and FaceTime work over Wi-Fi regardless of country code.
What language is spoken in Boston and Sofia?
Boston primarily speaks English; Sofia speaks Bulgarian. English is widely used in business contexts in major cities of both, but written contracts may need translation.
Do Boston and Sofia drive on the same side of the road?
Yes — both drive on the right. Rental cars feel identical between the two.