@remotemerge/nepali-date-converter/ndc-browser.js

A modern JavaScript library for seamless conversion between Bikram Sambat (BS) and Gregorian (AD) dates. Easily convert Nepali dates to English dates and vice versa with support for years 1975 BS to 2099 BS.

var DateConverter=(function(){function e(e,t){let n=new Date(e.getTime());return n.setUTCDate(n.getUTCDate()+t),n}function t(e,t){let n=Date.UTC(e.getUTCFullYear(),e.getUTCMonth(),e.getUTCDate()),r=Date.UTC(t.getUTCFullYear(),t.getUTCMonth(),t.getUTCDate());return Math.round((n-r)/(1440*60*1e3))}function n(e){return new Date(Date.UTC(e.getUTCFullYear(),e.getUTCMonth(),e.getUTCDate()))}function r(e){return new Date(Date.UTC(e.getUTCFullYear(),e.getUTCMonth(),e.getUTCDate(),23,59,59,999))}function i(e,t){let n=e.getTime();return n>=t.start.getTime()&&n<=t.end.getTime()}var a=[];return a[1975]=[31,31,32,32,31,30,30,29,30,29,30,30,365],a[1976]=[31,32,31,32,31,30,30,30,29,29,30,31,366],a[1977]=[30,32,31,32,31,31,29,30,30,29,29,31,365],a[1978]=[31,31,32,31,31,31,30,29,30,29,30,30,365],a[1979]=a[1975],a[1980]=a[1976],a[1981]=[31,31,31,32,31,31,29,30,30,29,29,31,365],a[1982]=a[1978],a[1983]=a[1975],a[1984]=a[1976],a[1985]=[31,31,31,32,31,31,29,30,30,29,30,30,365],a[1986]=a[1978],a[1987]=[31,32,31,32,31,30,30,29,30,29,30,30,365],a[1988]=a[1976],a[1989]=[31,31,31,32,31,31,30,29,30,29,30,30,365],a[1990]=a[1978],a[1991]=[31,32,31,32,31,30,30,30,29,29,30,30,365],a[1992]=[31,32,31,32,31,30,30,30,29,30,29,31,366],a[1993]=a[1989],a[1994]=a[1978],a[1995]=a[1991],a[1996]=a[1992],a[1997]=a[1978],a[1998]=[31,31,32,31,32,30,30,29,30,29,30,30,365],a[1999]=a[1976],a[2e3]=[30,32,31,32,31,30,30,30,29,30,29,31,365],a[2001]=a[1978],a[2002]=a[1975],a[2003]=a[1976],a[2004]=a[2e3],a[2005]=a[1978],a[2006]=a[1975],a[2007]=a[1976],a[2008]=a[1981],a[2009]=a[1978],a[2010]=a[1975],a[2011]=a[1976],a[2012]=a[1985],a[2013]=a[1978],a[2014]=a[1975],a[2015]=a[1976],a[2016]=a[1985],a[2017]=a[1978],a[2018]=a[1987],a[2019]=a[1992],a[2020]=a[1989],a[2021]=a[1978],a[2022]=a[1991],a[2023]=a[1992],a[2024]=a[1989],a[2025]=a[1978],a[2026]=a[1976],a[2027]=a[2e3],a[2028]=a[1978],a[2029]=a[1998],a[2030]=a[1976],a[2031]=a[2e3],a[2032]=a[1978],a[2033]=a[1975],a[2034]=a[1976],a[2035]=a[1977],a[2036]=a[1978],a[2037]=a[1975],a[2038]=a[1976],a[2039]=a[1985],a[2040]=a[1978],a[2041]=a[1975],a[2042]=a[1976],a[2043]=a[1985],a[2044]=a[1978],a[2045]=a[1987],a[2046]=a[1976],a[2047]=a[1989],a[2048]=a[1978],a[2049]=a[1991],a[2050]=a[1992],a[2051]=a[1989],a[2052]=a[1978],a[2053]=a[1991],a[2054]=a[1992],a[2055]=a[1978],a[2056]=a[1998],a[2057]=a[1976],a[2058]=a[2e3],a[2059]=a[1978],a[2060]=a[1975],a[2061]=a[1976],a[2062]=[30,32,31,32,31,31,29,30,29,30,29,31,365],a[2063]=a[1978],a[2064]=a[1975],a[2065]=a[1976],a[2066]=a[1981],a[2067]=a[1978],a[2068]=a[1975],a[2069]=a[1976],a[2070]=a[1985],a[2071]=a[1978],a[2072]=a[1987],a[2073]=a[1976],a[2074]=a[1989],a[2075]=a[1978],a[2076]=a[1991],a[2077]=a[1992],a[2078]=a[1989],a[2079]=a[1978],a[2080]=a[1991],a[2081]=a[1992],a[2082]=a[1978],a[2083]=a[1978],a[2084]=a[1976],a[2085]=a[2e3],a[2086]=a[1978],a[2087]=a[1975],a[2088]=a[1976],a[2089]=a[2e3],a[2090]=a[1978],a[2091]=a[1975],a[2092]=a[1976],a[2093]=a[1981],a[2094]=a[1978],a[2095]=a[1975],a[2096]=a[1976],a[2097]=a[1985],a[2098]=a[1978],a[2099]=a[1975],class{epochStart=new Date(Date.UTC(1918,3,13));epochEnd=new Date(Date.UTC(2043,3,13));errorMsg=`The input date is out of supported range.`;year;month;day;constructor(e){let[t,n,r]=this.parse(e);this.year=t,this.month=n,this.day=r}parse(e){let[t,n,r]=this.toEnglishDigits(e).replace(/[./|,]/g,`-`).trim().split(`-`).map(Number);return[t,n,r]}toEnglishDigits(e){let t=[`०`,`१`,`२`,`३`,`४`,`५`,`६`,`७`,`८`,`९`];return e.replace(/[०१२३४५६७८९]/g,e=>t.indexOf(e).toString())}toDayName(e){return[`Sunday`,`Monday`,`Tuesday`,`Wednesday`,`Thursday`,`Friday`,`Saturday`][e]}toAdDate(t,n,r){let i=0;for(let e=1975;e<t;e++)i+=a[e][12];for(let e=0;e<n-1;e++)i+=a[t][e];return i+=r-1,e(this.epochStart,i)}toBsDate(e){let t=e;for(let e in a){if(t>=a[e][12]){t-=a[e][12];continue}for(let n=0;n<12;n++){if(t>=a[e][n]){t-=a[e][n];continue}return{year:Number(e),month:n+1,date:t+1}}}throw Error(this.errorMsg)}toAd(){if(this.year<1975||this.year>2099)throw Error(this.errorMsg);let e=this.toAdDate(this.year,this.month,this.day);return{year:e.getFullYear(),month:e.getMonth()+1,date:e.getDate(),day:this.toDayName(e.getDay())}}toBs(){let e=new Date(Date.UTC(this.year,this.month-1,this.day));if(!i(e,{start:n(this.epochStart),end:r(this.epochEnd)}))throw Error(this.errorMsg);let a=t(e,this.epochStart);return{...this.toBsDate(a),day:this.toDayName(e.getUTCDay())}}}})();