// Reference to MeeusJs - https://github.com/Fabiz/MeeusJs
const abbr = "SMTOTFL";
const months = ["Januar", "Februar", "Marts", "April", "Maj", "Juni", "Juli", "August", "September", "Oktober", "November", "December"];
const Events = [
{ "danish": "Nytårsdag", "latin": "Circumcisio domini", "holliday": true, "primary": true },
{ "danish": "Helligtrekongersdag", "latin": "Epiphania", "holliday": false, "primary": false },
{ "danish": "1. s e Helligtrek.", "latin": "1 p. Epiphany", "holliday": true, "primary": false },
{ "danish": "2. s e Helligtrek.", "latin": "2 p. Epiphany", "holliday": true, "primary": false },
{ "danish": "3. s e Helligtrek.", "latin": "3 p. Epiphany", "holliday": true, "primary": false },
{ "danish": "4. s e Helligtrek.", "latin": "4 p. Epiphany", "holliday": true, "primary": false },
{ "danish": "5. s e Helligtrek.", "latin": "5 p. Epiphany", "holliday": true, "primary": false },
{ "danish": "6. s e Helligtrek.", "latin": "6 p. Epiphany", "holliday": true, "primary": false },
{ "danish": "Alle Helgensdag", "latin": "Omnium Sanctorum", "holliday": false, "primary": true },
{ "danish": "Mortensdag", "latin": "Morten Bisp", "holliday": false, "primary": true },
{ "danish": "1. søndag i Advent", "latin": "Adventus", "holliday": true, "primary": true },
{ "danish": "2. søndag i Advent", "latin": "2 Adventus", "holliday": true, "primary": true },
{ "danish": "3. søndag i Advent", "latin": "3 Adventus", "holliday": true, "primary": true },
{ "danish": "4. søndag i Advent", "latin": "4 Adventus", "holliday": true, "primary": true },
{ "danish": "Juledag", "latin": "Natio Christi", "holliday": true, "primary": true },
{ "danish": "2. Juledag", "latin": "Sanct Stefan", "holliday": true, "primary": true },
{ "danish": "9 søn før påske", "latin": "Septuagesima", "holliday": true, "primary": false, "easterDiffDays": -63 },
{ "danish": "8 søndag før påske", "latin": "Sexagesima", "holliday": true, "primary": false, "easterDiffDays": -56 },
{ "danish": "Fastelavnsøndag", "latin": "Quinquagesima", "holliday": true, "primary": true, "easterDiffDays": -49 },
{ "danish": "Hvide tirsdag", "latin": "Carnem Levare", "holliday": false, "primary": false, "easterDiffDays": -47 },
{ "danish": "Askeonsdag", "latin": "Caput Jejunii", "holliday": false, "primary": false, "easterDiffDays": -46 },
{ "danish": "6 søn f Påske ", "latin": "Quadragesima, Invocavit", "holliday": true, "primary": false, "easterDiffDays": -42 },
{ "danish": "5 søn f Påske ", "latin": "Reminiscere", "holliday": true, "primary": false, "easterDiffDays": -35 },
{ "danish": "4 søn f Påske ", "latin": "Oculi", "holliday": true, "primary": false, "easterDiffDays": -28 },
{ "danish": "Midfaste", "latin": "Laetare", "holliday": true, "primary": false, "easterDiffDays": -21 },
{ "danish": "2 søn f Påske ", "latin": "Judica", "holliday": true, "primary": false, "easterDiffDays": -14 },
{ "danish": "Palmesøndag", "latin": "Palmarum", "holliday": true, "primary": true, "easterDiffDays": -7 },
{ "danish": "Skærtorsdag", "latin": "Viridium", "holliday": true, "primary": true, "easterDiffDays": -3 },
{ "danish": "Langfredag", "latin": "Dies Adoratis, Passiones", "holliday": true, "primary": true, "easterDiffDays": -2 },
{ "danish": "Påskedag", "latin": "Pascha", "holliday": true, "primary": true, "easterDiffDays": 0 },
{ "danish": "2. påskedag ", "latin": "2. Pascha", "holliday": true, "primary": true, "easterDiffDays": 1 },
{ "danish": "1. søn e Påske", "latin": "Quasimodogeniti", "holliday": true, "primary": false, "easterDiffDays": 7 },
{ "danish": "2. søn e Påske", "latin": "Misericordia ", "holliday": true, "primary": false, "easterDiffDays": 14 },
{ "danish": "3. søn e Påske", "latin": "Jubilate", "holliday": true, "primary": false, "easterDiffDays": 21 },
{ "danish": "Store Bededag", "latin": "Metonoia", "holliday": true, "primary": true, "easterDiffDays": 26 },
{ "danish": "4. søn e Påske", "latin": "Cantate", "holliday": true, "primary": false, "easterDiffDays": 28 },
{ "danish": "5. søn e Påske", "latin": "Vocem jucunditatis", "holliday": true, "primary": false, "easterDiffDays": 35 },
{ "danish": "Kr Himmelfart", "latin": "Ascensionis Domini", "holliday": true, "primary": true, "easterDiffDays": 39 },
{ "danish": "6. søn e Påske", "latin": "Exaudi", "holliday": true, "primary": false, "easterDiffDays": 42 },
{ "danish": "Pinsedag", "latin": "Pentecoste", "holliday": true, "primary": true, "easterDiffDays": 49 },
{ "danish": "2. Pinsedag", "latin": "2. Pentecoste", "holliday": true, "primary": true, "easterDiffDays": 50 },
{ "danish": "Trinitatis", "latin": "Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 56 },
{ "danish": "1. søn e trin.", "latin": "1 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 63 },
{ "danish": "2. søn e trin.", "latin": "2 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 70 },
{ "danish": "3. søn e trin.", "latin": "3 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 77 },
{ "danish": "4. søn e trin.", "latin": "4 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 84 },
{ "danish": "5. søn e trin.", "latin": "5 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 91 },
{ "danish": "6. søn e trin.", "latin": "6 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 98 },
{ "danish": "7. søn e trin.", "latin": "7 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 105 },
{ "danish": "8. søn e trin.", "latin": "8 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 112 },
{ "danish": "9. søn e trin.", "latin": "9 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 119 },
{ "danish": "10. søn e trin.", "latin": "10 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 126 },
{ "danish": "11. søn e trin.", "latin": "11 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 133 },
{ "danish": "12. søn e trin.", "latin": "12 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 140 },
{ "danish": "13. søn e trin.", "latin": "13 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 147 },
{ "danish": "14. søn e trin.", "latin": "14 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 154 },
{ "danish": "15. søn e trin.", "latin": "15 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 161 },
{ "danish": "16. søn e trin.", "latin": "16 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 168 },
{ "danish": "17. søn e trin.", "latin": "17 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 175 },
{ "danish": "18. søn e trin.", "latin": "18 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 182 },
{ "danish": "19. søn e trin.", "latin": "19 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 189 },
{ "danish": "20. søn e trin.", "latin": "20 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 196 },
{ "danish": "21. søn e trin.", "latin": "21 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 203 },
{ "danish": "22. søn e trin.", "latin": "22 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 210 },
{ "danish": "23. søn e trin.", "latin": "23 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 217 },
{ "danish": "24. søn e trin.", "latin": "24 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 224 },
{ "danish": "25. søn e trin.", "latin": "25 p. Trinitatis", "holliday": true, "primary": false, "easterDiffDays": 231 },
{ "danish": "Mariæ Bebudelse", "latin": "Mariæ Bebudelse", "holliday": false, "primary": false, "easterDiffDays": -14 },
{ "danish": "Kyndelmisse", "latin": "Kyndelmisse", "holliday": false, "primary": false }
];
/**
* Start kalenderen med nuværende år
*/
document.addEventListener("DOMContentLoaded", function (event) {
let y = new Date().getFullYear();
document.getElementById('yearinput').value = y;
Run(y);
});
/**
* Pad enkeltciffer til dobbeltciffer ( 1 -> "01")
*/
function padout(number) {
return (number < 10) ? '0' + number : number;
}
/**
* Er året et skudår
*/
function leapYear(year) {
return ((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0);
}
/**
* Tilføj angivne antal dage til Date-objekt
*/
Date.prototype.addDays = function (dayOffset) {
var _date = new Date();
var millisecondOffset = dayOffset * 24 * 60 * 60 * 1000;
_date.setTime(this.getTime() + millisecondOffset);
return _date;
};
/**
*
* Formater Date-object til eks. "2020-04-12"
*
*/
Date.prototype.formatDate = function () {
month = '' + (this.getMonth() + 1),
day = '' + this.getDate(),
year = this.getFullYear();
if (month.length < 2)
month = '0' + month;
if (day.length < 2)
day = '0' + day;
return [year, month, day].join('-');
};
/**
*
* Find ISO Ugenr for datoen
*
*/
Date.prototype.getWeek = function () {
var onejan = new Date(this.getFullYear(), 0, 1);
var millisecsInDay = 86400000;
return Math.ceil((((this - onejan) / millisecsInDay) + onejan.getDay() + 1) / 7);
};
/**
*
* Finder datoen for den førstkommende ugedag angivet i dayOfWeek
* dayOfWeek (0=søndag .. 6=lørdag)
*
*/
Date.prototype.getNextDayOfWeek = function (dayOfWeek) {
var ret = new Date(this || new Date());
var day = (dayOfWeek - 1 - this.getDay() + 7) % 7 + 1;
if (day == 7) day = 0;
ret.setDate(ret.getDate() + day);
return ret;
};
let firstDayInYear = function(year){
if (year > 1700) {
return new Date(year, 0, 1).getDay(); //Find ugedag 1. januar
}
else {
return new Date(year-1, 11, 28).getDay(); //Hvis 1700 eller ældre: træk fire dage fra for korrekt ugedag
}
}
function findDates(year) {
var events = JSON.parse(JSON.stringify(Events)); // Tag kopi af events
var _easter = new Date(Easter(year)); // Find Påskesøndag
// Find dato for alle helligdage og mærkedage, der ikke er baseret på dato for påske
events[0].date = year + "-01-01"; //Nytårsdag
events[1].date = year + "-01-06"; // Helligtrekonger
// Søndage efter Helligtrekonger
var dt = new Date(year + "-01-06").getNextDayOfWeek(0);
let counter = 0;
for (ev = 2; ev < 8; ev++) {
events[ev].date = dt.addDays(counter).formatDate();
counter += 7;
}
events[8].date = new Date(year + "-11-01").getNextDayOfWeek(0).formatDate(); //Alle Helgensdag
events[9].date = year + "-11-11"; //Mortensdag
// Søndage i advent
dt = new Date(year + "-11-27");
events[10].date = dt.getNextDayOfWeek(0).formatDate(); // 1. søndag i advent (1. søndag efter 27/11)
counter = 7;
dt = new Date(events[10].date);
for (ev = 11; ev < 14; ev++) {
events[ev].date = dt.addDays(counter).formatDate();
counter += 7;
}
events[14].date = year + "-12-25"; // Juledag
events[15].date = year + "-12-26"; //2. juledag
for (ev = 16; ev < 67; ev++) { // Alle påskeafhængige mmærkedage
events[ev].date = _easter.addDays(events[ev].easterDiffDays).formatDate();
}
if (year < 1771) events[67].date = year + "-03-25"; //Marie Bebudelsesdag- indt 1771 d. 25. marts, derefter søndag før palmesøndag
else events[25].danish = "Mariæ Bebudelse"; // Skift "2. sæn. før påske" ud med "Marieæ Bebudelse"
// events[67].date = _easter.addDays(events[67].easterDiffDays).formatDate();
events[68].date = year + "-02-02"; //Kyndelmisse
return events;
}
function panelChanged() {
let i = document.getElementById('yearinput').value;
if (i.length == 4) {
if (i < 200) {
document.getElementById("yearinput").value = "0200";
i = 200;
}
Run(Number(i));
}
}
function Run(year) {
var events = findDates(year);
var monthlength = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
if (leapYear(year)) monthlength[1] = 29; //Sæt antald age i februar til 29 i skudår
if (year == 1700) monthlength[1] = 18; //O Overgang fra Juliansk til Gregoriansk kalender 1. marts 1700
//Tøm kalenderen for evt. indhold
Array.from(document.getElementsByClassName("threemonthcontainer")).forEach(function(e) {e.innerHTML=""});
let abbrcounter = 0;
let julianMoonPhases = [];
abbrcounter = firstDayInYear(year);
if (year < 1700) julianMoonPhases = moonPhaseInYear(year);
var content = "";
for (monthcounter = 0; monthcounter < months.length; monthcounter++) {
var monthname = months[monthcounter];
content += '<div class="month">';
if ([0, 3, 6, 9].indexOf(monthcounter) > -1)
content += '<div class="yearheader" id= "yearheader' + monthcounter + '" >' + year + '</div>';
else
content += '<div class="yearheader"></div>';
content += '<div class="header">' + monthname + '</div>';
for (daycounter = 1; daycounter < monthlength[monthcounter] + 1; daycounter++) {
let id = year + "-" + padout(monthcounter + 1) + "-" + padout(daycounter);
let _date = new Date(year, monthcounter, daycounter);
let moonClass = "";
if (document.getElementById("moonCheck").checked) {
if (year > 1699) moonClass = getMoonSymbolGregorian(_date.formatDate());
else {
let thisPhase = null;
thisPhase = julianMoonPhases.find(o => o.dato === id);
if (thisPhase != null) {
if (thisPhase.phase == "new") moonClass = "🌑"; else
if (thisPhase.phase == "full") moonClass = "🌕"; else
if (thisPhase.phase == "firstquarter") moonClass = " 🌓"; else
if (thisPhase.phase == "lastquarter") moonClass = "🌗"; else
moonClass = "";
}
}
}
let divcolor = "";
let bgcolor = "";
let _abbr = abbr[abbrcounter];
let wn = "";
let eventName = "";
//if (id.substr(0,1)=="0") id = id.substr(1,id.length-1);
var idx = events.findIndex(x => x.date == id);
// if ((idx == -1) && (year < 1000)) {
// if (id.substr(0, 1) == "0") id = id.substr(1, id.length - 1);
// idx = events.findIndex(x => x.date == id);
// }
let latin = document.getElementById("latinCheck").checked;
let extended = document.getElementById("eventCheck").checked;
if (idx > -1) {
if (extended != true) {
if (events[idx].primary == true)
if (latin == true)
eventName = events[idx].latin; else
eventName = events[idx].danish;
} else {
if (latin == true)
eventName = events[idx].latin; else
eventName = events[idx].danish;
}
if (events[idx].holliday === true) divcolor = "grayed";
}
if (_abbr == "L") { bgcolor = "grayed" } else
if (_abbr == "S") { divcolor = "grayed" } else
if (_abbr == "M") { wn = new Date(id).getWeek(); } // Sæt ugenr hver mandag
content += '<div id="' + id + '" class="day ' + divcolor + '"><span class="abbr ' + bgcolor + '">' + _abbr + '</span><span class="daynumber ' + bgcolor + '">' + daycounter + '</span><span class="eventtitle" style="max-height: 17px; width: 190.2px; top: 4px;">' + eventName + '</span><span class="moon">' + moonClass + '</span><span class="weeknumber">' + wn + '</span></div>';
abbrcounter++;
if (abbrcounter == 7) abbrcounter = 0;
}
content += '</div>';
if (monthcounter < 3) document.getElementById("firstquarter").innerHTML += content; else
if (monthcounter < 6) document.getElementById("secondquarter").innerHTML += content; else
if (monthcounter < 9) document.getElementById("thirdquarter").innerHTML += content; else
if (monthcounter < 12) document.getElementById("fourthquarter").innerHTML += content;
content = "";
}
}
//Fra 1. marts 1700 og frem
let getMoonSymbolGregorian = function (_date) {
let moonClass = "";
let fromDate = "";
year = _date.substr(0, _date.indexOf('-'));
// Hvis 1700, så kun fra 1. marts og året ud
if (year == 1700) {
fromDate = new Date(year + '-03-01T00:00:00.000Z');
} else
fromDate = new Date(year + '-01-01T00:00:00.000Z');
let toDate = new Date(year + '-12-31T23:59:59.999Z');
let fullMoon_list = phaseRange(fromDate, toDate, FULL);
let newMoon_list = phaseRange(fromDate, toDate, NEW);
let firstQuarterMoon_list = phaseRange(fromDate, toDate, FIRST);
let lastQuarterMoon_list = phaseRange(fromDate, toDate, LAST);
// Hardcoder månefaser for januar/februar 1700
if (year == 1700) {
fullMoon_list.push("1700-01-24");
newMoon_list.push("1700-01-10");
newMoon_list.push("1700-02-09");
firstQuarterMoon_list.push("1700-01-18");
firstQuarterMoon_list.push("1700-02-16");
lastQuarterMoon_list.push("1700-01-02");
lastQuarterMoon_list.push("1700-01-31");
}
if (newMoon_list.indexOf(_date) > -1) moonClass = "🌑"; else
if (fullMoon_list.indexOf(_date) > -1) moonClass = "🌕"; else
if (firstQuarterMoon_list.indexOf(_date) > -1) moonClass = " 🌓"; else
if (lastQuarterMoon_list.indexOf(_date) > -1) moonClass = "🌗";
return moonClass;
}
let moonPhase = function (date) {
var jdo = new A.JulianDay(date);
var coord = A.EclCoord.fromWgs84(55.719437, 13.197304, 50);
var suntp = A.Solar.topocentricPosition(jdo, coord, true);
var moontp = A.Moon.topocentricPosition(jdo, coord, true);
var i = A.MoonIllum.phaseAngleEq2(moontp.eq, suntp.eq);
return A.MoonIllum.illuminated(i);
}
let moonPhaseInYear = function (y) {
var previousValue = 0;
var currentValue = 0;
var date = new Date(y - 1, 11, 31, 14, 0, 0); // Start med sidste dag i året før
var previousDate = date.formatDate();
var quarterStigende = true;
var currentQuarterValue = 0;
var phases = [];
previousValue = moonPhase(date);
var previousQuarterValue = Math.abs(0.5 - previousValue); //Afvigelse fra kvarter
var stigende;
do { // For alle dage i året
currentValue = moonPhase(date);
currentQuarterValue = Math.abs(0.5 - currentValue);
if (currentQuarterValue > previousQuarterValue) {
if (quarterStigende == false) {
if (previousDate.indexOf(y) > -1)
phases.push({ "dato": previousDate, "phase": "quarter" }); // Sæt foreløbig til "quarter", vi ved endnu ikke om det er første eller tredje
}
quarterStigende = true;
}
else {
quarterStigende = false;
}
if (currentValue > previousValue) {
if (stigende == false) {
phases.push({ "dato": previousDate, "phase": "new" });
}
stigende = true;
}
else {
if (stigende == true) {
phases.push({ "dato": previousDate, "phase": "full" });
}
stigende = false;
}
previousValue = currentValue;
previousQuarterValue = currentQuarterValue;
previousDate = date.formatDate();
date = date.addDays(1);
}
while (date.getFullYear() == y)
var i = 0;
for (i = 0; i < phases.length; i++) { //På baggrund af nymånbe og fuldmåne søt 1. og 3. kvarter
if (i == 0) {
if (phases[1].phase == "new") phases[0].phase = "lastquarter";
if (phases[1].phase == "full") phases[0].phase = "firstquarter";
}
else
if (i == phases.legth) {
if (phases[i - 1].phase == "new") phases[i].phase = "lastquarter";
if (phases[i - 1].phase == "full") phases[i].phase = "firstquarter";
}
if (i != phases.legth && (i != 0)) {
if (phases[i].phase == "new") {
phases[i - 1].phase = "lastquarter";
if (i + 1 < phases.length)
phases[i + 1].phase = "firstquarter";
}
if (phases[i].phase == "full") {
phases[i - 1].phase = "firstquarter";
if (i + 1 < phases.length)
phases[i + 1].phase = "lastquarter";
}
}
}
return phases;
}
function Easter(y) {
if (y >= 1700) {
return GregorianEaster(y); //Gregorianske kalender indført 1.marts 1700 (altså før påskedag i året)
} else {
return JulianEaster(y); //Find påske efter juliansk kalender indtil 1. marts 1700
}
}
//Se Wikipedia: Beregning af datoen for påskedag
// https://da.wikipedia.org/wiki/P%C3%A5ske#Beregning_af_datoen_for_p%C3%A5skedag
function GregorianEaster(y) {
Y = parseInt(y);
var C = Math.floor(Y / 100);
var N = Y - 19 * Math.floor(Y / 19);
var K = Math.floor((C - 17) / 25);
var I = C - Math.floor(C / 4) - Math.floor((C - K) / 3) + 19 * N + 15;
I = I - 30 * Math.floor((I / 30));
I = I - Math.floor(I / 28) * (1 - Math.floor(I / 28) * Math.floor(29 / (I + 1)) * Math.floor((21 - N) / 11));
var J = Y + Math.floor(Y / 4) + I + 2 - C + Math.floor(C / 4);
J = J - 7 * Math.floor(J / 7);
var L = I - J;
var M = 3 + Math.floor((L + 40) / 44);
var D = Math.floor(L + 28 - 31 * Math.floor(M / 4));
if (y == 1744) return Y + "-" + padout(3) + "-" + padout(29);
return Y + "-" + padout(M) + "-" + padout(D); // 12-04-2020
}
// JulianEaster baeret på J R Stocktons "The Calculation of Easter Sunday":
// https://people.cs.nctu.edu.tw/~tsaiwn/sisc/runtime_error_200_div_by_0/www.merlyn.demon.co.uk/estr-bcp.htm
function JulianEaster(Y) {
Y = parseInt(Y);
function GoldenNumber(Yr) { return Mod(Yr, 19) + 1 }
function Mod(X, Y) { return X - Math.floor(X / Y) * Y }
function GNtoJulianPFM(GN) { // By analogy with Gregorian data
// Golden Number to PFM as Day-of-March, valid perpetually
var T = 21 + (GN * 19 - 4) % 30; return T
}
function Div(X, Y) { return Math.floor(X / Y) /* full range */ }
function JulianSundayNumber(Y) {
var Z = 4 + Y + Div(Y, 4)
return 6 - Mod(Z, 7) /* 0-6 matches Sunday Letter A-G */
}
function JPFMtoDate2(Year, DM) {
var SN // Ahead to Julian Sunday
SN = JulianSundayNumber(Year)
return YDoMtoYMonDD(Year, SundayAfterPFM(DM, SN))
}
function YDoMtoYMonDD(Y, DM) { return Y + DoMtoMonDD(DM) }
function DoMtoMonDD(DM) {
return DM > 31 ? "-04-" + LZ(DM - 31) : "-03-" + DM
}
function LZ(n) { return (n != null && n < 10 && n >= 0 ? "0" : "") + n }
function SundayAfterPFM(DM, SN) { // plus 1..7 days to Sunday, J & G
return DM + 1 + (60 + SN - DM) % 7 /* Day-of-March */
}
Y = parseInt(Y);
var GN = GoldenNumber(Y)
var PFM = GNtoJulianPFM(GN)
return JPFMtoDate2(Y, PFM)
}
/*
* TruePhase and PhaseRange er dele af lune.js;
* Author: Ryan Seys (https://github.com/ryanseys)
* Author: Jay LaPorte (https://github.com/ironwallaby)
*/
const NEW = 0
const FIRST = 1
const FULL = 2
const LAST = 3
function dsin(d) {
return Math.sin(torad(d))
}
function dcos(d) {
return Math.cos(torad(d))
}
function torad(d) {
return (Math.PI / 180.0) * d
}
function fromDate(date) {
return date.getTime() / 86400000 + 2440587.5
}
function toDate(julian) {
return new Date((julian - 2440587.5) * 86400000)
}
function truephase(k, tphase) {
tphase = tphase & 3
k = k + 0.25 * tphase
const t = (1.0 / 1236.85) * k
let pt = 2415020.75933 +
29.53058868 * k +
(0.0001178 - 0.000000155 * t) * t * t +
0.00033 * dsin(166.56 + (132.87 - 0.009173 * t) * t)
const m = 359.2242 + 29.10535608 * k - (0.0000333 - 0.00000347 * t) * t * t
const mprime = 306.0253 + 385.81691806 * k + (0.0107306 + 0.00001236 * t) * t * t
const f = 21.2964 + 390.67050646 * k - (0.0016528 - 0.00000239 * t) * t * t
switch (tphase) {
case NEW:
case FULL:
pt += (0.1734 - 0.000393 * t) * dsin(m) +
0.0021 * dsin(2 * m) -
0.4068 * dsin(mprime) +
0.0161 * dsin(2 * mprime) -
0.0004 * dsin(3 * mprime) +
0.0104 * dsin(2 * f) -
0.0051 * dsin(m + mprime) -
0.0074 * dsin(m - mprime) +
0.0004 * dsin(2 * f + m) -
0.0004 * dsin(2 * f - m) -
0.0006 * dsin(2 * f + mprime) +
0.0010 * dsin(2 * f - mprime) +
0.0005 * dsin(m + 2 * mprime)
break
case FIRST:
case LAST:
pt += (0.1721 - 0.0004 * t) * dsin(m) +
0.0021 * dsin(2 * m) -
0.6280 * dsin(mprime) +
0.0089 * dsin(2 * mprime) -
0.0004 * dsin(3 * mprime) +
0.0079 * dsin(2 * f) -
0.0119 * dsin(m + mprime) -
0.0047 * dsin(m - mprime) +
0.0003 * dsin(2 * f + m) -
0.0004 * dsin(2 * f - m) -
0.0006 * dsin(2 * f + mprime) +
0.0021 * dsin(2 * f - mprime) +
0.0003 * dsin(m + 2 * mprime) +
0.0004 * dsin(m - 2 * mprime) -
0.0003 * dsin(2 * m + mprime)
const sign = (tphase < FULL) ? +1 : -1
pt += sign * (0.0028 - 0.0004 * dcos(m) + 0.0003 * dcos(mprime))
break
}
return toDate(pt)
}
function phaseRange(start, end, phase) {
if (end - start < 0) {
let temp = end
end = start
start = temp
}
start = start.getTime()
end = end.getTime()
let t = start - 45 * 86400000
let k
{
const d = new Date(t)
k = Math.floor(12.3685 * (d.getFullYear() + (1.0 / 12.0) * d.getMonth() - 1900))
}
let date = truephase(k, phase)
while (date.getTime() < start) {
k++
date = truephase(k, phase)
}
const list = []
while (date.getTime() <= end) {
list.push(date.formatDate())
k++
date = truephase(k, phase)
}
return list
}
!
