ad-bs-engine

A simple JavaScript package to convert dates between AD & BS and provide the basis for BS calendar generation.

Installation

npm i ad-bs-engine

Import

import { getAdFromBs, getBsFromAd, getBsMonthInfo } from "ad-bs-engine";

Features & Usage

• Convert date from BS to AD (BS->AD)

  const dateInAd = getAdFromBs(2081, 10, 2);
  console.log(dateInAd);

• Convert date from AD to BS (AD->BS)

  const dateInBs = getBsFromAd(2025, 1, 14);
  console.log(dateInBs);

• Get month info i.e. total days and starting weekday

  // Sample code to generate calendar for Kartik month of 2082 BS
  const { totalDays, firstWeekday } = getBsMonthInfo(2082, 6);
  
  const weekdays = ["SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT"];
  const calendar = [];
  
  for (let i = 0; i < totalDays; i++) {
    const weekday = weekdays[(firstWeekday + i) % 7];
    const day = i + 1;
    calendar.push({ weekday, day });
  }
  
  console.table(calendar);

NOTE

Months are zero-based: 0 = January/Baishak (1st month), 11 = December/Chaitra (12th month).
Weekdays are zero-based: 0 = Sunday, 6 = Saturday.

CAUTION

Not all BS & AD years are supported out of the box.
To support a specific year, add its configuration to mapping.js.