Foreign embassies — US, UK, Schengen, Canada, Australia, Japan, Korea, Gulf — accept only the Gregorian (AD) calendar on their visa forms. Your Nepali citizenship certificate and most of your supporting documents are in Bikram Sambat (BS). The conversion is mechanical, but the consequences of getting it wrong are not: even a single-day mismatch between your visa form, your passport, and your supporting documents can trigger additional verification, delays, or outright refusal. This guide walks through the process step by step, covers country-specific format requirements, and shows you how to head off the most common problems.

The core problem

Visa officers verify identity by cross-referencing the date of birth on your application against your passport, your sponsor documents (university acceptance letters, employer letters, invitation letters), and any biometric records they already hold from previous applications. If even one of these documents shows a different date — even by a day — the application is flagged. Most embassies handle this conservatively: they ask for clarification, request original documents, or refuse the application pending resolution. Resolution usually takes weeks and may require a fresh application fee.

So the goal is simple: make sure your visa application's AD date of birth matches your passport's AD date of birth exactly, and that both are correctly derived from your underlying BS date of birth on your citizenship certificate.

Step 1: locate your BS date of birth

Your BS DOB is on your citizenship certificate (Nagarikta). It usually appears in the format Year/Month/Day, sometimes with the Nepali script. Cross-reference with:

Birth registration certificate from your ward office
School-leaving certificate (SLC/SEE)
Migration certificate if you transferred between schools

If any of these disagree, the citizenship certificate takes legal precedence in Nepal. Resolve inconsistencies through the District Administration Office before you apply for an international visa — fixing the underlying record is far easier than explaining a mismatch on a visa form.

Step 2: convert with a verified tool

Use the BS to AD converter to convert your DOB. Enter year, month and day exactly as printed on your citizenship. The converter returns the AD date and day of the week. Do not use mental arithmetic — see our step-by-step DOB conversion guide for why naive year subtraction fails for dates around the BS new year.

Step 3: cross-check against your passport

Your Nepali passport already contains your AD date of birth in two places — the printed data page and the Machine-Readable Zone at the bottom. Verify that the converter's result matches the passport date exactly.

If they match — use the passport DOB on your visa form. You are done with the conversion.
If they differ — the passport DOB is the internationally recognised record. Use it on the visa form, but also resolve the discrepancy at the Passport Office or District Administration Office before applying again. Carrying inconsistent documents long-term creates problems for everything from banking to property transactions abroad.

Step 4: match the format required by the destination country

Different visa systems use different date formats. Once you have your AD year, month and day from the converter, format them according to the application's expectations.

Country	Application	Format	Example
US	DS-160	DD-MMM-YYYY	14-APR-1990
UK	UKVI online	DD/MM/YYYY	14/04/1990
Schengen (most)	VFS / consulate forms	DD.MM.YYYY	14.04.1990
Canada	IRCC portal	YYYY-MM-DD	1990-04-14
Australia	ImmiAccount	DD/MM/YYYY	14/04/1990
Japan	e-visa	YYYY/MM/DD	1990/04/14
Korea	K-ETA	YYYY-MM-DD	1990-04-14
UAE / GCC	various	DD/MM/YYYY	14/04/1990

Always include leading zeros (write 04, not 4). The biggest mistake in mixed US-UK households is confusing 04/05 with 05/04 — under US convention this is May 4 and April 5 respectively; under UK convention it is April 5 and May 4. The form's expected format determines the meaning.

Step 5: ensure consistency across all supporting documents

Visa applications usually require:

Passport (AD date)
Bank statements (AD date in the account-holder profile)
Employer letters or university acceptances (AD date)
Invitation letters (AD date)
Tax returns (BS dates — usually attached as supporting evidence; not a problem because the visa officer reads them as supporting financial evidence, not for identity verification)

The key principle: identity documents should all show the same AD DOB. Supporting evidence in BS is fine if it is clearly labelled. If your bank statement shows a different date than your passport, fix the bank record before applying.

Step 6: handle older documents and apostille requirements

Some embassies (especially for student visas and skilled migration) require apostilled or notarised copies of your educational certificates. These will typically be in BS. The apostille process attaches a foreign-ministry seal to the document — but does not convert the date. You will usually need to provide an officially stamped translation that includes the AD equivalent. Translation agencies in Kathmandu specialise in this and know the correct format for each destination country.

Step 7: triple-check before submitting

Before clicking Submit:

Re-enter the AD DOB from the passport (not from memory)
Check the day-of-week if the form asks
Confirm the format matches the form's example
Look at the printed preview of the form before paying the fee

What to do if you have no Nepali passport yet

If this is your first international application and you don't yet have a passport, apply for the passport first. The passport application requires your citizenship certificate; the Passport Office will derive the AD date from the BS date on your citizenship. Once you receive your passport, use the AD DOB printed on it for all subsequent international applications.

Handling DOB discrepancies between documents

If you discover a discrepancy — for example, your SLC shows one BS date and your citizenship shows another — fix it at source. Carrying two different DOBs on different documents will eventually catch up with you:

Most embassies share data with their counterparts after a refused visa
UK biometric records persist for ten years and are checked at every visa application
Some Schengen consulates cross-reference DOB with prior US or UK applications

Get the inconsistency resolved through the District Administration Office or the Department of Information Technology (depending on which document is wrong) before you make a second application.

Tips for specific visa categories

Student visa — your university's CAS / I-20 / CoE document will use the AD DOB from your passport. Use the same on the visa form.
Work visa — your employer's offer letter and the embassy's biometric record must match. Ask your employer to verify the DOB on the offer matches your passport before they file.
Tourist visa — fewer documents, but the rule still holds. Use your passport DOB.
Family reunion visa — your sponsor's documents and your own must match. Many family visa refusals come down to inconsistent dates between sibling or spouse documents.

Practical takeaway

Convert once, verify against your passport, and use the passport AD date everywhere. Most Nepali adults will need this date on dozens of forms over their lifetime — getting it pinned down early saves repeated effort and removes one of the most common reasons for visa-application failures.

Frequently asked questions

Can I write my DOB in BS on a visa form?

No. Visa forms accept only the Gregorian calendar. Use the AD date from your passport, derived from your citizenship BS date via the BS to AD converter.

What if my passport DOB is wrong?

Get it corrected at the Passport Office before applying. Do not submit a visa form with a different date "hoping it works out" — it will create problems on later applications.

What if my citizenship certificate's BS date is wrong?

Apply for a correction at the District Administration Office, providing supporting documents (birth registration, school records, family records). Once the citizenship is corrected, the passport can be corrected to match.

Do US and UK use the same date format?

No. The US DS-160 uses DD-MMM-YYYY (14-APR-1990), the UK uses DD/MM/YYYY (14/04/1990). Always check the form's example.

Can a single-day DOB error really cause a visa rejection?

Yes. Most embassies treat any mismatch between application DOB and passport DOB as a serious data-quality flag. Even if not refused outright, it usually delays the application significantly.