Bangla Date

bangla-date.js

Date.prototype.addHours = function(h){
	this.setHours(this.getHours()+h);
	return this;
}

var timeStamp = new Date().addHours(-6);

function getBanglaDateAndMonth() {
	var hours = timeStamp.getHours();
	var date = timeStamp.getDate();
	var month = timeStamp.getMonth(); 
	var year = timeStamp.getFullYear();		
    var monthName;
    var monthLists = ["বৈশাখ", "জ্যৈষ্ঠ", "আষাঢ়", "শ্রাবণ", "ভাদ্র", "আশ্বিন", "কার্তিক", "অগ্রহায়ণ", "পৌষ", "মাঘ", "ফাল্গুন", "চৈত্র"];


	if (month >= 3 && date >= 13) {
		year = (year - 593);
	} else {
		year = (year - 594);
	}


	switch (month) {
		case 0:
			if (date >= 1 && date <= 13) {
				date += 17;
				monthName = monthLists[8]; //"পৌষ"
			} else {
				date -= 13;
				monthName = monthLists[9]; //"মাঘ"
			}
		break;
		
		case 1:
			if (date >= 1 && date <= 12) {
				date += 18;
				monthName = monthLists[9]; //"মাঘ"
			} else {
				date -= 12;
				month = "ফাল্গুন";
				monthName = monthLists[10]; //"ফাল্গুন"
			}
		break;
		
		case 2:
			if (date >= 1 && date <= 14) {
				date += isLeapYear() ? 17 : 16;
				monthName = monthLists[10]; //"ফাল্গুন"
			} else {
				date -= 14;
				monthName = monthLists[11]; //"চৈত্র"
			}
		break;
		
		case 3:
			if (date >= 1 && date <= 13) {
				date += 17;
				monthName = monthLists[11]; //"চৈত্র"
			} else {
				date -= 13;
				monthName = monthLists[0]; //"বৈশাখ"
			}
		break;
		
		case 4:
			if (date >= 1 && date <= 14) {
				date += 17;
				monthName = monthLists[0]; //"বৈশাখ"
			} else {
				date -= 14;
				monthName = monthLists[1]; //"জ্যৈষ্ঠ"
			}
		break;
		
		case 5:
			if (date >= 1 && date <= 14) {
				date += 17;
				monthName = monthLists[1]; //"জ্যৈষ্ঠ"
			} else {
				date -= 14;
				monthName = monthLists[2]; //"আষাঢ়"
			}
		break;
		
		case 6:
			if (date >= 1 && date <= 15) {
				date += 16;
				monthName = monthLists[2]; //"আষাঢ়"
			} else {
				date -= 15;
				monthName = monthLists[3]; //"শ্রাবণ"
			}
		break;
		
		case 7:
			if (date >= 1 && date <= 15) {
				date +=  16;
				monthName = monthLists[3]; //"শ্রাবণ"
			} else {
				date -=  15;
				monthName = monthLists[4]; //"ভাদ্র"
			}
		break;
		
		case 8:
			if (date >= 1 && date <= 15) {
				date +=  16;
				monthName = monthLists[4]; //"ভাদ্র"
			} else {
				date -=  15;
				monthName = monthLists[5]; //"আশ্বিন"
			}
		break;
		
		case 9:
			if (date >= 1 && date <= 15) {
				date += 15;
				monthName = monthLists[5]; //"আশ্বিন"
			} else {
				date -= 15;
				monthName = monthLists[6]; //"কার্তিক"
			}
		break;
		
		case 10:
			if (date >= 1 && date <= 14) {
				date += 16;
				monthName = monthLists[6]; //"কার্তিক"
			} else {
				date -= 14;
				monthName = monthLists[7]; //"অগ্রহায়ণ"
			}
		break;
		
		case 11:
			if (date >= 1 && date <= 14) {
				date += 16;
				monthName = monthLists[7]; //"অগ্রহায়ণ"
			} else {
				date -= 14;
				monthName = monthLists[8]; //"পৌষ"
			}
		break;
		
	}
		
	return {"year" : year, "date" : date, "month" : monthName};
}

function isLeapYear() {
	var year = timeStamp.getFullYear();	
	return ((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0);
}

String.prototype.convertDigitToBangla = function() {
	var convertToBanglaDigit = {'1': '১', '2': '২', '3': '৩', '4' : '৪', '5' : '৫', '6' : '৬', '7' : '৭', '8' : '৮', '9' : '৯',  '0' : '০'};
	return this.replace(/[1234567890]/g, function(match) {
		return convertToBanglaDigit[match];
	});
};

document.getElementById("bangla-date").innerHTML = (getBanglaDateAndMonth().date.toString().convertDigitToBangla() + " " + getBanglaDateAndMonth().month + ", " + getBanglaDateAndMonth().year.toString().convertDigitToBangla());