Ask the "община"
(municipality) about address registration and "Миграция"
(the migration office) about foreign residents’ residence procedures. You'll need the address for a GP, a school or a bank. Rules change — always check with the institution.
Explore Bulgaria
Address registration
In Bulgaria, two address terms are "постоянен адрес"
(permanent address, shown on the ID card) and "настоящ адрес"
(current address, where you actually live).

Travel Guide Bulgaria
Guide to the whole of Bulgaria
Explore Bulgaria

1aeg.sofia · CC BY 4.0 · Source
School in Bulgaria
The school year usually starts on 15 September — "първият учебен ден"
(the first school day) is a celebration with flowers for the teacher.

Bin im Garten · CC BY-SA 3.0 · Source
Market day
Every town has its "пазар"
(market), and many places have a weekly market day, often at the weekend.

VasilPetrov92 · CC BY-SA 4.0 · Source
Horo — the chain dance
At weddings, fairs and holidays Bulgarians dance the "хоро"
— a chain of people holding hands or belts.