What is Bikram Sambat (BS)?
विक्रम सम्बत्
Bikram Sambat (BS) is Nepal's official calendar, a lunisolar Hindu calendar about 56.7 years ahead of the Gregorian (AD) calendar — so 2025 AD falls in 2081–2082 BS. Its new year begins in mid-April (1 Baisakh), and it is used for all official dates in Nepal.
The BS year has 12 months (Baisakh to Chaitra) whose lengths vary from 29 to 32 days and change year to year, so conversion requires a lookup table.
Government records, school dates, holidays and contracts all use BS; the converter maps any BS date to AD and back.
Sources & data note
Definitions explain standard Nepali terms in everyday and official use. Land-unit conversions follow the standard Nepali measurement system; tax and contribution rates reflect current law (Income Tax Act 2058, VAT Act 2052, Social Security Act 2074) and are revised each fiscal year by the Finance Act — always confirm current-year figures with the relevant authority.