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EXEIdeas – Let's Your Mind Rock » HTML-CSS-PHP-JavaScript / JavaScript Codes » Pure JavaScript Formula To Calculate And Show Islamic Hijri Dates

Pure JavaScript Formula To Calculate And Show Islamic Hijri Dates

Pure-JavaScript-Formula-To-Calculate-And-Show-Islamic-Hijri-Dates
If you do not need fancy looking Hijri calendar widget, or you want to style the calendar text by yourself, or you are a webmaster or a web developer that want to build your own Hijri calendar web applications, then the following code may be of use.

The script (modified from Robert van Gent’s page) calculates approximate Hijri dates from the current computer’s date. It is based on an arithmetical calculation to match the current moon phase. The calculation is based on a 30-year lunar cycle where the length of the lunar months is defined alternatingly as 29 or 30 days. Every two or three years an extra day is added at the end of the year to keep up with the phase of the moon. This formula is also similar to the “Kuwaiti Algorithm” used by Microsoft to define Hijri Calendar dates.

There are many code snippets available online or on many other blogs and websites but everyone is not able to optimize your blog or website so you need some optimized code snippet. So now checkout out the code snippet for your blog and website that will give you all features for your desired code. Now grab the ready to use code and paste it where you want.

Table of Contents

Features:

  1. Light Weight.
  2. Pure Vanilla JavaScript.
  3. Cross Browser.
  4. No External Files.
  5. Fully Customizable.
  6. Set Opacity On After Detecting.
  7. Top 5 Browser Added.

How To Detect Browser Using Pure Vanilla JavaScript?

There are a few easy and understandable steps to achieve your desired functionality using pure Vanilla JavaScript that we are gonna share below. Follow each step perfectly.

JavaScript:

<script>
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;
if (adjust) {
wd = gmod(jd + 1 - adjust, 7) + 1;
} else {
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; }
</script>

Example Outputs:

Below is an example output of the above script (the writeIslamicDate function) without date adjustment:

Khams, 10 Jumadal Akhira 1443 AH

Customization:

Use the below code to call the function. You can make it in the loop to update the time minutes by minutes.

document.write(writeIslamicDate());

Below is with date adjustment of 1 (advanced one day):

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Khams, 11 Jumadal Akhira 1443 AH

The code:

document.write(writeIslamicDate(1));

No need to customize it. Just copy-paste. Rest edit the code as per comments and need.

Troubleshooting the Errors:

Do it with concentration and patience. Check your alls steps and again and all codes or scripts. If you find any error you can contact us anytime via comment or better via email, We are always here to help you.

Final Words:

That’s all we have. We hope that you liked this article. If you have any problem with this code in your template then feel free to contact us with a full explanation of your problem. We will reply to you as time allows us or If you have any doubts and problems please comment below. We are happy to help you! If you liked this article, Don’t forget to share this with your friends so they can also take benefit from it and leave.

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