Nepali Date Converter (BS ↔ AD)

How to use the converter

The tool has two parts. Use the one that matches the date you already have.

1. BS → AD: type the BS year, pick the month and type the day. Then press Convert to AD. You can type English or Nepali digits, for example 2083 or २०८३.
2. AD → BS: pick a date in the date box and press Convert to BS.
3. Today fills in today's date from your own device.
4. Copy copies the result as one line of text.

Each result shows the weekday in English and Nepali, the month name in both languages, and the date in Devanagari digits, such as २०८३ असोज १५. If a date does not exist, for example day 32 in a month of 31 days, the tool tells you how many days that month has.

What is Bikram Sambat?

Bikram Sambat (BS), also written Vikram Samvat, बिक्रम सम्बत or विक्रम संवत, is the official calendar of Nepal. Government offices, schools, banks and newspapers in Nepal use it. Many Nepali documents, such as the citizenship certificate, show the date of birth in BS. In Nepal, the Gregorian calendar used in most other countries is called AD, or the English date.

The BS year number is 56 or 57 more than the AD year:

• From mid-April to 31 December, add 57. 1 October 2026 is in BS 2083.
• From 1 January to mid-April, add 56. 1 January 2027 is still in BS 2083.

This is why people say BS is about 56 years and 8 months ahead of AD. The BS new year, Baisakh 1, comes in mid-April. In every year this tool supports, it falls on 13 or 14 April.

Why BS months have 29 to 32 days

BS months follow the Sun. A new month starts when the Sun moves into the next sign of the zodiac. This moment is called a sankranti. Seen from the Earth, the Sun moves faster at some times of the year than at others, so the time from one sankranti to the next changes. In summer the months are long: Jestha, Asar and Shrawan have 31 or 32 days. In winter they are short: Poush and Magh have 29 or 30 days.

The day each month starts depends on the exact time of the sankranti. So the same month can have 31 days one year and 32 days the next, and there is no simple formula. Calendar makers in Nepal work out the months with the traditional Surya Siddhanta method. A government committee, the Nepal Panchanga Nirnayak Bikas Samiti, checks and approves the calendars before they are published. Because of this, a converter needs a table with the length of every month of every year. This tool has that table for BS 2000 to 2083.

How the conversion works, step by step

The tool counts days from a fixed starting point: BS 2000 Baisakh 1, which was 14 April 1943. Here is the same method by hand for 15 Asoj 2083:

1. Find Baisakh 1 of that year. BS 2083 started on 14 April 2026.
2. Add the full months before Asoj: Baisakh 31 + Jestha 31 + Asar 32 + Shrawan 31 + Bhadra 31 = 156 days. So Asoj 1 was 17 September 2026.
3. Add the days inside the month. 15 Asoj is 14 days after Asoj 1.
4. 156 + 14 = 170 days after 14 April 2026, which is Thursday, 1 October 2026.

AD to BS works the other way: count the days since 14 April 1943, then take away whole years and months. The tool counts plain calendar days, so your time zone cannot move the result.

Worked examples

All results below come from this tool.

Nepal's fiscal year

Nepal's fiscal year (आर्थिक वर्ष) starts on Shrawan 1 and ends on the last day of Asar in the next BS year. In AD, this is mid-July to mid-July. Fiscal year 2082/83 ran from 17 July 2025 to 16 July 2026, which was Asar 32, 2083. Fiscal year 2083/84 started on 17 July 2026. It ends on the last day of Asar 2084, around mid-July 2027. The exact AD date depends on the 2084 calendar, which is not final yet.

Limits and where the data comes from

• Supported range: BS 2000 Baisakh 1 to BS 2083 Chaitra 30, which is 14 April 1943 to 13 April 2027. A date outside this range shows a message, not a guess.
• How we checked the table: we compared nine open-source date libraries. For BS 2000 to 2080 they agree on every month, except one library in 2062, where the other eight agree. Before BS 2000 they disagree in several years, such as 1977 and 1991, so those years are left out.
• BS 2081 to 2083: two older libraries, last updated in 2022, still have estimates made before the official calendars came out. The seven newer libraries and the printed 2081, 2082 and 2083 calendars all agree, so the tool uses those.
• Why not BS 2084 yet: the calendar committee asked for the 2084 calendar calculations by Asoj 20, 2083, so the official calendar is not out yet. The libraries even disagree on whether 2084 has 365 or 366 days. 2084 can be added once the official calendar is published.
• Dates only: the Today button uses the date on your device. Nepal uses UTC+5:45. If you are in another country, your date and the date in Nepal can be different for a few hours each day.
• No festival dates: Dashain, Tihar and most festivals follow the Moon (tithi), so they move inside the BS months from year to year. Check a Nepali patro for festival days.