Currency
The Vietnamese dong is the local currency. Cards are accepted in cities and hotels, while markets, street food stalls and small towns prefer cash.
Language
Vietnamese is the national language. English is understood in tourist areas, hotels and tour offices, though a translation app is handy elsewhere.
Time difference
Vietnam is 1 hour 30 minutes ahead of Indian Standard Time (IST).
Weather
The country is long, so conditions vary: the north has a cool season and the south stays tropical, while the centre sees heavy rain and storms mid-year.
Connectivity
Local SIMs and eSIMs are cheap and quick to set up on arrival, roaming packs work, and Wi-Fi is widely available in hotels and cafes.
Food & culture
Vietnamese cooking is herb-heavy, with pho, bun cha, banh mi and rice-paper rolls varying by region. Fish sauce is widespread; vegetarians should seek com chay, while halal choices are limited outside larger cities. Dress modestly at pagodas, remove shoes in homes and pass items to elders with both hands.