Full version: jsB@nk » Time » Validation » Calculator for Easter Sunday
URL: https://www.javascriptbank.com/calculator-for-easter-sunday.html
Use this JavaScript to figure out when Easter Sunday will be in a given year. The timing of the holiday depends on the full moon.
Full version: jsB@nk » Time » Validation » Calculator for Easter Sunday
URL: https://www.javascriptbank.com/calculator-for-easter-sunday.html
<script type="text/javascript"><!-- Begin// Created by: Matthew Ogden , ogden1972@earthlink.net | http://www.home.earthlink.net/~ogden1972/function d(){var a = document.form1.year.value;a=a*1if (a >= 2100) c=5;if (a < 2100) c=6;if (a > 2199) alert("you must enter a date between 1583 - 2199");if ( a<=1582) alert("you must enter a date between 1583 - 2199"); s = a/4var b = Math.floor( s ) ;sn=(b+a+c)/7var d = Math.floor( sn ) ;sundaynumber = (sn-d)*7m =(a*1)+1g = m/19var e = Math.floor( g ) ;var goldennumber = (g-e)*19;var sundaynumber= Math.round(sundaynumber) ;if(a>2199) sundaynumber=7;if(a<=1582) sundaynumber=7;var goldennumber= Math.round(goldennumber) ;var t1= "April 16April 17April 18April 19April 20April 21April 15" ;var t2= "April 9April 10April 4April 5April 6April 7April 8" ;var t3= "March 26March 27March 28March 29March 30March 24March 25" ;var t4= "April 16April 17April 18April 12April 13April 14April 15" ;var t5= "April 2April 3April 4April 5April 6April 7April 1";var t6= "April 23April 24April 25April 19April 20April 21April 22" ;var t7= "April 9April 10April 11April 12April 13April 14April 15" ;var t8= "April 2April 3April 4March 29March 30March 31April 1";var t9= "April 23April 17April 18April 19April 20April 21April 22" ;var t10= "April 9April 10April 11April 12April 6April 7April 8" ;var t11= "March 26March 27March 28March 29March 30March 31April 1" ;var t12= "April 16April 17April 18April 19April 20April 14April 15" ;var t13= "April 9April 3April 4April 5April 6April 7April 8" ;var t14= "March 26March 27March 28March 29March 23March 24March 25" ;var t15= "April 16April 17April 11April 12April 13April 14April 15" ;var t16= "April 2April 3April 4April 5April 6March 31April 1" ;var t17= "April 23April 24April 18April 19April 20April 21April 22" ;var t18= "April 9April 10April 11April 12April 13April 14April 8" ;var t19= "April 2April 3March 28March 29March 30March 31April 1" ;if (goldennumber == 1) chart=t1;if (goldennumber == 2) chart=t2;if (goldennumber == 3) chart=t3;if (goldennumber == 4) chart=t4;if (goldennumber == 5) chart=t5;if (goldennumber == 6) chart=t6;if (goldennumber == 7) chart=t7;if (goldennumber == 8) chart=t8;if (goldennumber == 9) chart=t9;if (goldennumber == 10) chart=t10;if (goldennumber == 11) chart=t11;if (goldennumber == 12) chart=t12;if (goldennumber == 13) chart=t13;if (goldennumber == 14) chart=t14;if (goldennumber == 15) chart=t15;if (goldennumber == 16) chart=t16;if (goldennumber == 17) chart=t17;if (goldennumber == 18) chart=t18;if (goldennumber == 19) chart=t19;if (sundaynumber==0) document.form1.date.value = (chart.substring(0,8) )+", "+a;if (sundaynumber==6) document.form1.date.value = (chart.substring(8,16) )+", "+a;if (sundaynumber==5) document.form1.date.value = (chart.substring(16,24) )+", "+a;if (sundaynumber==4) document.form1.date.value = (chart.substring(24,32) )+", "+a;if (sundaynumber==3) document.form1.date.value = (chart.substring(32,40) )+", "+a;if (sundaynumber==2) document.form1.date.value = (chart.substring(40,48) )+", "+a;if (sundaynumber==1) document.form1.date.value = (chart.substring(48,56) )+", "+a;if(sundaynumber==7) document.form1.date.value = "error";}// End --></script><!-- This script downloaded from www.JavaScriptBank.com Come to view and download over 2000+ free javascript at www.JavaScriptBank.com--><form Name="form1">Year: <input type="text" name="year" size="15"> Date: <input type="text" name="date" readonly size="15"><br><br><input Type="button" value="Calculate" onclick="d()"> <input type="Reset" value="Clear"> <input Type="button" value="Print" onclick="window.d();print()"></form><!-- This script downloaded from www.JavaScriptBank.com Come to view and download over 2000+ free javascript at www.JavaScriptBank.com-->