How to convert Nepali dates accurately for visa and official forms

A step-by-step guide to converting your Nepali (BS) date of birth and document dates to Gregorian (AD) correctly for visa, immigration, and admission forms.

Daniel Raja

Software engineer and technical writer

June 22, 2026 · 3 min read

When you're filling a visa, immigration, or university form, the date of birth on the form has to match your passport and citizenship exactly. A one-day error is enough to get an application flagged. So the goal isn't simply converting the date. It's converting it so the result matches your official records every time.

Here's the reliable way to do it.

Step 1: Find the date on your source document

Start from the document the receiving office will check against. That is usually your citizenship or passport. Read the Nepali (BS) date carefully:

Note the year, month, and day separately.
Watch the month name. बैशाख (Baisakh) and भदौ (Bhadra) are easy to mix up at a

glance; असार (Ashadh) and असोज (Ashwin) get confused in romanization.

Step 2: Convert against the official calendar

Don't estimate, and don't reuse a number someone gave you years ago. Convert the exact date against the real Nepali calendar.

Pick BS → AD, enter the year, month, and day, and read off the Gregorian date, including the weekday, which is a useful cross-check.

Step 3: Cross-check the result

Before you write it down, sanity-check it:

Year boundary. If your BS date is in Chaitra (the last month, mid-March

to mid-April), the AD year is usually one less than the BS year minus 56. If it's in Baisakh or later, the gap is 57. (The complete BS-to-AD guide explains why.)

Plausible month. 1 Baisakh is always mid-April. If a converter puts it in

winter, you've entered something wrong.

Weekday. If you happen to know the weekday you were born, confirm it

matches.

Step 4: Record both dates together

Once you have the AD date, write both the BS and AD versions in your own records, side by side. Every future form (bank, PAN, embassy, school) will ask for one or the other, and having both prevents you from re-deriving the conversion, and possibly re-erroring it, each time.

Common mistakes to avoid

Using a fixed +56 years 8 months offset. It drifts and breaks near the

April boundary. Always use the calendar lookup.

Converting the day and month but leaving the year by habit. Double-check

the year actually changed correctly.

Trusting a screenshot from years ago. Calendars and your reading of them

can differ; reconvert from the source document.

Mismatched dates across documents. If your visa form, flight booking, and

passport disagree by even a day, fix them to a single converted value.

A note on documents stuck in old fonts

If your source date sits inside an old Nepali document typed in a legacy font like Preeti, the text may look like gibberish on your screen until it's converted to Unicode. In that case, sort out the text first. Nepali Unicode vs Preeti covers how. Then read the date and convert it.

Get the conversion right once, record both versions, and the dates stay consistent across every form you ever file.

Key takeaways

Foreign visa, immigration, and admission forms expect the Gregorian (AD) date,

so convert your BS date of birth and keep both versions on record.

Convert against the official Nepali calendar rather than a fixed offset, which

can be off by a day near the mid-April year boundary.

Cross-check the result: 1 Baisakh is always mid-April, and the weekday is a

useful confirmation.

Use a client-side converter so your personal dates never leave your device.

This article was prepared with AI-assisted drafting and reviewed by a human editor for accuracy, clarity, and relevance.

Frequently asked questions

Which date should I enter on a foreign form, BS or AD?+

Foreign visa, immigration, and admission forms almost always expect the Gregorian (AD) date. Convert your BS date of birth from your citizenship or passport to AD, and keep both versions noted so they always match across documents.

Why does my converted birth date differ by a day from an old conversion?+

Older or rule-of-thumb conversions that use a fixed offset can be off by a day, especially near the mid-April year boundary. A converter that uses the official panchanga day-length table gives the date that matches government records.

My passport shows only a BS date. What AD date do I use for flights?+

Convert the BS issue and expiry dates to AD and use those, since airline and immigration systems work in Gregorian dates. Double-check the expiry especially, a wrong AD expiry can cause boarding problems.

Is it safe to enter my date of birth into an online converter?+

With a client-side converter, the calculation runs entirely in your browser and your date never leaves your device. That's the kind to use for personal documents.