问题
How do you convert Gregorian dates to Islamic Hijri dates using JavaScript?
回答1:
function gmod(n,m){
return ((n%m)+m)%m;
}
function kuwaiticalendar(adjust){
var today = new Date();
if(adjust) {
adjustmili = 1000*60*60*24*adjust;
todaymili = today.getTime()+adjustmili;
today = new Date(todaymili);
}
day = today.getDate();
month = today.getMonth();
year = today.getFullYear();
m = month+1;
y = year;
if(m<3) {
y -= 1;
m += 12;
}
a = Math.floor(y/100.);
b = 2-a+Math.floor(a/4.);
if(y<1583) b = 0;
if(y==1582) {
if(m>10) b = -10;
if(m==10) {
b = 0;
if(day>4) b = -10;
}
}
jd = Math.floor(365.25*(y+4716))+Math.floor(30.6001*(m+1))+day+b-1524;
b = 0;
if(jd>2299160){
a = Math.floor((jd-1867216.25)/36524.25);
b = 1+a-Math.floor(a/4.);
}
bb = jd+b+1524;
cc = Math.floor((bb-122.1)/365.25);
dd = Math.floor(365.25*cc);
ee = Math.floor((bb-dd)/30.6001);
day =(bb-dd)-Math.floor(30.6001*ee);
month = ee-1;
if(ee>13) {
cc += 1;
month = ee-13;
}
year = cc-4716;
wd = gmod(jd+1,7)+1;
iyear = 10631./30.;
epochastro = 1948084;
epochcivil = 1948085;
shift1 = 8.01/60.;
z = jd-epochastro;
cyc = Math.floor(z/10631.);
z = z-10631*cyc;
j = Math.floor((z-shift1)/iyear);
iy = 30*cyc+j;
z = z-Math.floor(j*iyear+shift1);
im = Math.floor((z+28.5001)/29.5);
if(im==13) im = 12;
id = z-Math.floor(29.5001*im-29);
var myRes = new Array(8);
myRes[0] = day; //calculated day (CE)
myRes[1] = month-1; //calculated month (CE)
myRes[2] = year; //calculated year (CE)
myRes[3] = jd-1; //julian day number
myRes[4] = wd-1; //weekday number
myRes[5] = id; //islamic date
myRes[6] = im-1; //islamic month
myRes[7] = iy; //islamic year
return myRes;
}
function writeIslamicDate(adjustment) {
var wdNames = new Array("Ahad","Ithnin","Thulatha","Arbaa","Khams","Jumuah","Sabt");
var iMonthNames = new Array("Muharram","Safar","Rabi'ul Awwal","Rabi'ul Akhir",
"Jumadal Ula","Jumadal Akhira","Rajab","Sha'ban",
"Ramadan","Shawwal","Dhul Qa'ada","Dhul Hijja");
var iDate = kuwaiticalendar(adjustment);
var outputIslamicDate = wdNames[iDate[4]] + ", "
+ iDate[5] + " " + iMonthNames[iDate[6]] + " " + iDate[7] + " AH";
return outputIslamicDate;
}
This converts current computer date to hijri. And with a little modification you can achieve that this snippet change any date to islamic
document.write(writeIslamicDate(1));
Taken from This site
回答2:
If you need only the year of Hijri date converted from Gregorian date (Miladi date) you can simply write this equation in javascript:
var GregorianYear = (new Date()).getFullYear();
var HijriYear = Math.round((GregorianYear - 622) * (33 / 32));
you can use this simple equation in the footer in master page like كل الحقوق محفوطة لـ ... ©
<script type="text/javascript">document.write((new Date()).getFullYear())</script> م - <script type="text/javascript">var y = (new Date()).getFullYear();var h = Math.round((y - 622) * (33 / 32));document.write(h)</script> هـ
you will get: كل الحقوق محفوطة لـ ... © 2014 م - 1435 هـ
you can also use C# embedded in asp page as:
<%= DateTime.Now.Year %> - <%= Math.Round((DateTime.Now.Year - 622) * 1.03125) %>
will return : 2014 - 1436
Finally, if you need to convert to UmAlQura date, simply try this line of code:
let _date = new Date('7/10/2019').toLocaleDateString('ar-SA').format('DD/MM/YYYY');
console.log(_date);
will return : ٧/١١/١٤٤٠ هـ
回答3:
Checkout my library hijrah-date which is a Javascript date in the Hijrah calendar system.
It also supports Hijrah to Gregorian and Gregorian to Hijrah conversion. In addition to date formatting.
来源:https://stackoverflow.com/questions/5177598/converting-gregorian-date-to-hijri-date