Nepali Date Converter (BS ↔ AD)

BS to AD Converter (Bikram Sambat to English Gregorian)

The BS to AD Converter translates traditional Nepali Bikram Sambat dates into standard Gregorian calendar dates. This two-way calculation is essential for completing official documentation such as MRPs & e-Passports, US Diversity Visa (DV) lottery entries, student visa applications (I-20, CAS, COE), and international identity checks. Because Bikram Sambat runs roughly 56.7 years ahead with month counts ranging between 29 and 32 days, our mapped engine ensures exact calendar synchronization with day of the week, Tithi, and festival details.

AD to BS Converter (English Gregorian to Bikram Sambat)

The AD to BS Converter converts international English dates into official Nepali Bikram Sambat (B.S.) calendar dates in both English and Devanagari numerals. It is widely used across Nepal for land registry records (Malpot), citizenship registration, civil service exams (Lok Sewa Aayog), banking and tax compliance (PAN/VAT), and verifying Hindu festival dates such as Dashain, Tihar, and Teej from international schedules.

What is Bikram Sambat (B.S.)?

Bikram Sambat (abbreviated B.S.) is the official calendar of Nepal. Named after the legendary Indian king Vikramaditya, it is a solar calendar based on ancient Hindu astrological principles. The B.S. calendar is approximately 56.7 years ahead of the Gregorian calendar (A.D.). For example, the start of the Nepali year (New Year's Day or Baisakh 1) falls around mid-April in the Gregorian calendar.

Difference Between B.S. and A.D. Calendars

The primary difference lies in how month lengths are computed. In the Gregorian calendar, month lengths are fixed (except for leap years). In contrast, the Bikram Sambat calendar aligns with the sidereal movement of the sun across different zodiac symbols (Sankranti). Because the transit time varies, B.S. months have changing lengths (ranging from 29 to 32 days) determined on a yearly basis by astronomical calculations. This variability makes static conversion formulas impossible, requiring a mapped reference table database.

History of the Nepali Calendar

The calendar has deep historic roots across the Indian subcontinent and was historically adapted by different rulers in Nepal. It was established as Nepal's official civil calendar during the Rana Dynasty by Chandra Shumsher in 1958 B.S. Since then, government systems, newspapers, holidays, and official transactions in Nepal have been dated using Bikram Sambat.

Why Is Date Conversion Required?

Because Nepal uses Bikram Sambat locally while the rest of the world uses the Gregorian calendar (A.D.), seamless translation is essential for various modern applications:

• Government Documents: Official papers such as citizenship certificates, passports, birth certificates, and land deeds are issued in B.S. but require A.D. conversions for international verification and visa applications.
• Academic Applications: Nepalese students applying to overseas universities must convert their transcript dates, school completion terms, and birth dates from B.S. to A.D.
• Banking and Finance: Financial transactions, tax filings, and account statements utilize B.S. inside Nepal, while international trade, invoicing, and cross-border bank integrations run strictly on A.D.
• Travel and Tourism: Tourists booking hotels, flights, and tours need translation between flight schedules (Gregorian) and Nepalese public holidays/festivals (Bikram Sambat).
• DV Lottery & Immigration: Applicants must convert their B.S. birth date to A.D. format when filling the Diversity Visa lottery and other immigration forms.