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: Surabaya uses the IDR (Rp) and Sofia uses the BGN (лв). Language shifts too — Indonesian in Surabaya, Bulgarian in Sofia. Be careful behind the wheel: Surabaya drives on the left, Sofia on the right.
- Country
- Indonesia
- Capital
- Jakarta
- Currency
- Indonesian rupiah (IDR · Rp)
- Language
- Indonesian
- Calling code
- +62
- Drives on
- Left
- 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 Surabaya and Sofia?
Surabaya is 4 hours behind Sofia. Surabaya runs on GMT+7 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 4 hours 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 Surabaya from Sofia?
About 10,508 km as the crow flies (great-circle distance). A non-stop commercial flight cruises that in roughly 12h 52m, 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 Surabaya and Sofia use?
Surabaya uses the Indonesian rupiah (IDR, Rp); 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 Surabaya from Sofia?
Dial the international prefix used by your carrier (often 00), then +62, 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 Surabaya and Sofia?
Surabaya primarily speaks Indonesian; Sofia speaks Bulgarian. English is widely used in business contexts in major cities of both, but written contracts may need translation.
Do Surabaya and Sofia drive on the same side of the road?
No. Indonesia drives on the left, Bulgaria on the right. If you're renting, expect a learning curve on the first day — especially at roundabouts and when judging the centre of the lane.