Nepal uses the Bikram Sambat (BS) calendar as the official calendar, while most of the world uses Gregorian (AD). Converting between them is essential for forms, visas, and international correspondence.
Why conversion is not simple arithmetic
It is tempting to assume BS is just AD plus 56 years, but that only works as a rough guide. The two calendars have different month lengths, different year-start dates, and BS months are not fixed at 30 or 31 days. A BS year can have a month of 29, 30, 31, or 32 days, and the pattern changes from year to year.
That is why a date converter is not a luxury. For anything official, guessing the offset or adding 56 years and a few months can produce a date that is off by days, which is enough to invalidate a form or miss a deadline.
Quick facts
- BS vs AD: BS is approximately 56 years and 8 months ahead of AD
- Official calendar: BS is used for government documents, festivals, and daily use in Nepal
- New Year: Nepali New Year usually falls in mid-April (Baisakh 1)
- Month lengths: BS months vary between 29 and 32 days
- Leap years: Both calendars have their own adjustment rules
The “56 years and 8 months” figure is an approximation for quick mental orientation, not a conversion method. In Baisakh, the gap is about 56 years and 8 months; by Chaitra, it is closer to 57 years.
Convert online (easiest)
Use the Nepali Date Converter on this site:
- Select conversion direction (BS to AD or AD to BS)
- Enter year, month, day
- Get instant result
- Copy the result into your form and double-check the day and month order
If you are converting an AD date to BS, remember that the Nepali day starts at the same midnight for civil purposes, but the calendar date can differ from what a website timestamp shows if the site uses a different time zone. For official forms, use the date as written on the document, not a server timestamp.
Common conversions
| Event | Approximate relation |
|---|---|
| Nepali New Year 2083 | Usually mid-April 2026 |
| BS 2000 | Roughly 1943 AD |
Exact dates vary year to year.
More precisely, recent Nepali New Year dates have been:
| BS year | Baisakh 1 falls on |
|---|---|
| 2080 | 14 April 2023 |
| 2081 | 13 April 2024 |
| 2082 | 14 April 2025 |
| 2083 | 14 April 2026 |
Use these as anchors, not as a formula for every date in the year.
The BS months and their AD equivalents
| BS month | Usually begins around |
|---|---|
| Baisakh | Mid-April |
| Jestha | Mid-May |
| Ashadh | Mid-June |
| Shrawan | Mid-July |
| Bhadra | Mid-August |
| Ashwin | Mid-September |
| Kartik | Mid-October |
| Mangsir | Mid-November |
| Poush | Mid-December |
| Magh | Mid-January |
| Falgun | Mid-February |
| Chaitra | Mid-March |
The exact start date shifts by a day or two depending on the year’s month lengths. For a form, always use the converter rather than this table.
Manual conversion notes
Manual conversion is error-prone because:
- BS month lengths vary (based on lunar-solar calculations)
- The offset changes slightly over long periods
- Different sources may have minor variations
Always use a converter based on official tables for important documents.
The manual method, if you must do it
- Find the AD date of Baisakh 1 for the BS year in question.
- Find the number of days in each BS month of that year, using an official calendar table.
- Count the full months before your BS month and add their days.
- Add the day number minus one.
- Add that total to the AD date of Baisakh 1.
For example, Baisakh 1, 2082 falls on 14 April 2025. Baisakh 15 is therefore 14 days later: 28 April 2025. Converting a date in Jestha or later requires knowing whether Baisakh had 31 or 32 days that year, which is why the table is essential.
This method is fine for understanding the process, but it is not a substitute for a reliable converter when the date matters legally.
Where conversion is needed
- Visa and immigration forms that ask for dates in AD
- University applications with AD deadlines
- Bank and insurance documents that record both calendars
- Software systems storing dates in ISO format
- Employment contracts and appointment letters
- Travel bookings where the airline system only understands AD
In Nepal, many official documents show both BS and AD. If only one is shown, check which calendar the form expects before filling it in. Writing a BS date in an AD field is a common mistake that can delay an application.
Common mistakes
- Adding exactly 56 years and assuming the day and month are unchanged
- Using 30 days for every BS month
- Confusing the day/month order in forms (Nepal often uses day/month/year, while some systems use month/day/year)
- Converting the date but forgetting the year offset near Nepali New Year
- Relying on a converter with a limited range
- Using a screenshot of a conversion instead of the tool’s actual result
Check the supported range
Most converters cover a practical range, such as 1975 to 2100 BS, but some stop earlier or later. If you are working with a historical date, a birth certificate from decades ago, or a future project date, check that the tool supports it. A converter that silently returns a wrong result outside its range is worse than no converter.
Tips
- Double-check: For official forms, verify with the converter
- Use correct format: Enter dates as per the tool
- Check range: Some converters don’t support very old dates
- Keep a record: Save the converted date and the original side by side
- Use two tools for critical dates: If both agree, you can be more confident
- Do not round: A one-day error can matter for age limits and deadlines
Checklist
- Use the Nepali Date Converter tool
- Verify the result
- Use the correct calendar for your form
- Check the day/month order expected by the form
- Confirm the date is within the converter’s supported range
- Keep both the BS and AD versions in your records
Conversion is based on standard tables. For critical legal matters, confirm with the issuing authority.
