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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" integrity="sha384-GJzZqFGwb1QTTN6wy59ffF1BuGJpLSa9DkKMp0DgiMDm4iYMj70gZWKYbI706tWS" crossorigin="anonymous">
<link rel="stylesheet" href="../css/common.css" />
<link rel="stylesheet" href="css/site.css" />
<title>D'ni date converter</title>
</head>
<body>
<header>
<nav aria-label="breadcrumb">
<ol class="breadcrumb">
<li class="breadcrumb-item"><img src="/images/wiki.png" style="height:28px;width:auto;vertical-align: middle" /> <a href="/utilities">Guild of Archivists Utilities</a></li>
<li class="breadcrumb-item active" aria-current="page">D'ni date converter</li>
</ol>
</nav>
</header>
<main role="main">
<div class="container">
<h2>Convert Gregorian date to D'ni</h2>
<div class="row">
<div class="col-md-6">
<div class="card border-warning bg-white">
<h6 class="card-header bg-warning">Gregorian date (Cavern Time, UTC-0700)</h6>
<div class="card-body">
<form>
<div class="form-row align-items-center mb-2">
<div class="col-auto">
<select id="GregorianDateMonth" class="custom-select">
<option value="1">January</option>
<option value="2">February</option>
<option value="3">March</option>
<option value="4">April</option>
<option value="5">May</option>
<option value="6">June</option>
<option value="7">July</option>
<option value="8">August</option>
<option value="9">September</option>
<option value="10">October</option>
<option value="11">November</option>
<option value="12">December</option>
</select>
</div>
<div class="col-auto">
<input type="number" id="GregorianDateDay" maxlength="2" step="1" class="form-control" min="1" max="31" />
</div>
<div class="col-auto">
<div class="input-group">
<input type="number" id="GregorianDateYear" maxlength="4" step="1" min="1" class="form-control" />
<div class="input-group-append" id="SurfaceEraSelector">
<button class="btn btn-outline-secondary dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">CE</button>
<div class="dropdown-menu">
<a class="dropdown-item" href="#">BCE</a>
<a class="dropdown-item" href="#">CE</a>
</div>
</div>
</div>
</div>
</div>
<div class="form-row align-items-center">
<div class="col-auto">
<input type="number" id="GregorianDateHour" class="form-control" maxlength="2" value="12" min="1" max="12" />
</div>
<div class="col-auto m-0 p-0">
:
</div>
<div class="col-auto">
<div class="input-group">
<input type="number" id="GregorianDateMinute" class="form-control pad-numbers" maxlength="2" value="00" min="0" max="59" />
</div>
</div>
<div class="col-auto m-0 p-0">
:
</div>
<div class="col-auto">
<div class="input-group">
<input type="number" id="GregorianDateSecond" class="form-control pad-numbers" maxlength="2" value="00" min="0" max="59" />
<div class="input-group-append" id="MeridianSelector">
<button class="btn btn-outline-secondary dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">AM</button>
<div class="dropdown-menu">
<a class="dropdown-item" href="#">AM</a>
<a class="dropdown-item" href="#">PM</a>
</div>
</div>
</div>
</div>
<div class="col-auto">
<button id="ConvertSurfaceToCavernDate" class="btn btn-warning">Convert to D'ni Date</button>
</div>
</div>
</form>
</div>
</div>
</div>
<div class="col-md-6">
<div class="card bg-white">
<h6 class="card-header">D'ni date</h6>
<div class="card-body">
<input type="text" class="form-control" id="DniDate" value="" placeholder="Enter a date using the 'Gregorian date' fields." aria-describedby="dniDateHelp" />
<small class="form-text text-muted" id="dniDateHelp">
Time is listed in gartahvotee:tahvotee:gorahntee:prorahntee.<br />For more information about D'ni time, see <a href="https://archive.guildofarchivists.org/wiki/D%27ni_time" target="_blank">this Guild of Archivists article</a>.
</small>
</div>
</div>
</div>
</div>
<br />
<h2>Convert D'ni date to Gregorian</h2>
<div class="row">
<div class="col-md-6">
<div class="card border-warning bg-white">
<h6 class="card-header bg-warning">D'ni date</h6>
<div class="card-body">
<form>
<div class="form-row align-items-center mb-2">
<div class="col-auto">
<select id="DniDateVailee" class="custom-select">
<option value="1">Leefo</option>
<option value="2">Leebro</option>
<option value="3">Leesahn</option>
<option value="4">Leetar</option>
<option value="5">Leevot</option>
<option value="6">Leevofo</option>
<option value="7">Leevobro</option>
<option value="8">Leevosahn</option>
<option value="9">Leevotar</option>
<option value="10">Leenovoo</option>
</select>
</div>
<div class="col-auto">
<input type="number" id="DniDateYahr" maxlength="2" step="1" class="form-control" min="1" max="29" />
</div>
<div class="col-auto">
<div class="input-group">
<input type="number" id="DniDateHahr" maxlength="4" step="1" min="0" class="form-control" />
<div class="input-group-append" id="DniEraSelector">
<button class="btn btn-outline-secondary dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">DE</button>
<div class="dropdown-menu">
<a class="dropdown-item" href="#">BE</a>
<a class="dropdown-item" href="#">DE</a>
</div>
</div>
</div>
</div>
</div>
<div class="form-row align-items-center">
<div class="col-auto mx-1 px-0">
<input type="number" id="DniDateGartahvo" class="form-control pad-numbers" maxlength="1" value="0" min="0" max="4" />
</div>
<div class="col-auto m-0 p-0">
:
</div>
<div class="col-auto mx-1 px-0">
<input type="number" id="DniDateTahvo" class="form-control pad-numbers" maxlength="2" value="00" min="0" max="24" />
</div>
<div class="col-auto m-0 p-0">
:
</div>
<div class="col-auto mx-1 px-0">
<input type="number" id="DniDateGorahn" class="form-control pad-numbers" maxlength="2" value="00" min="0" max="24" />
</div>
<div class="col-auto m-0 p-0">
:
</div>
<div class="col-auto mx-1 px-0">
<input type="number" id="DniDateProrahn" class="form-control pad-numbers" maxlength="2" value="00" min="0" max="24" />
</div>
<div class="col-auto px-0">
<button id="ConvertCavernToSurfaceDate" class="btn btn-warning">Convert to Gregorian Date</button>
</div>
</div>
</form>
</div>
</div>
</div>
<div class="col-md-6">
<div class="card bg-white">
<h6 class="card-header">Gregorian date</h6>
<div class="card-body">
<form>
<div class="form-group row">
<label for="SurfaceDate" class="col-sm-2">UTC</label>
<div class="col-sm-10">
<input type="text" class="form-control" id="SurfaceDate" value="" placeholder="Enter a date using the 'D‘ni date' fields." />
</div>
</div>
<div class="form-group row">
<label for="SurfaceDateLocal" class="col-sm-2">Cavern</label>
<div class="col-sm-10">
<input type="text" class="form-control" id="SurfaceDateCavern" value="" placeholder="Enter a date using the 'D‘ni date' fields." />
</div>
</div>
<div class="form-group row">
<label for="SurfaceDateLocal" class="col-sm-2">Local</label>
<div class="col-sm-10">
<input type="text" class="form-control" id="SurfaceDateLocal" value="" placeholder="Enter a date using the 'D‘ni date' fields." />
</div>
</div>
</div>
</div>
</div>
</div>
<br />
<h2>Notes</h2>
<h3>Accuracy</h3>
<p>
While this date converter does account for leap seconds, it may not be perfectly accurate down to the exact second/prorahn when converting dates back and forth, especially over large time scales.
</p>
<h3>The distant past</h3>
<p>
This converter outputs Gregorian dates under all circumstances. However, the Gregorian calendar was only officially adopted for the first time in 1582,
and its adoption was staggered throughout the world, with some countries not adopting it until the early 20th century. As such, be cautious when using
this converter to "line up" an historical event with something that happened in the Cavern. Entering Julian calendar dates for ancient history will
not provide the correct D'ni date, and you will receive <a href="https://en.wikipedia.org/wiki/Proleptic_Gregorian_calendar">Proleptic Gregorian dates</a>
when converting the D'ni date for almost any event that took place before <i>Myst</i>.
</p>
<br />
<div class="row">
<div class="col-md-12 text-center">
<p>
Implementation by <a href="http://www.twitter.com/alahmnat">@alahmnat</a>. Based on <a href="http://jsfiddle.net/154e70as/">work</a> by RIUM+, Jehon the Scribe, and rokama. Additional contributions by Brett Middleton.<br />
More information is available <a href="https://archive.guildofarchivists.org/wiki/D%27ni_time_conversion">here</a>.
</p>
</div>
</div>
</div>
</main>
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.6/umd/popper.min.js" integrity="sha384-wHAiFfRlMFy6i5SRaxvfOCifBUQy1xHdJ/yoi7FRNXMRBu5WHdZYu1hA6ZOblgut" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/js/bootstrap.min.js" integrity="sha384-B0UglyR+jN6CkvvICOB2joaf5I4l3gm9GU6Hc1og6Ls7i6U/mkkaduKaBhlAXv9k" crossorigin="anonymous"></script>
<script src="js/DniDate.js"></script>
<script type="text/javascript">
var surfaceEra = "CE";
var dniEra = "DE";
var meridian = "AM";
$("#SurfaceEraSelector a").on("click", function() {
$("#SurfaceEraSelector button:first-child").text($(this).text());
surfaceEra = $(this).text();
});
$("#DniEraSelector a").on("click", function() {
$("#DniEraSelector button:first-child").text($(this).text());
dniEra = $(this).text();
});
$("#MeridianSelector a").on("click", function(e) {
e.preventDefault();
$("#MeridianSelector button:first-child").text($(this).text());
meridian = $(this).text();
});
$(".pad-numbers").on("change", function() {
if($(this).val() < 10) {
$(this).val("0" + $(this).val());
}
})
$("#ConvertSurfaceToCavernDate").on("click", function(e) {
e.preventDefault();
if($("#GregorianDateYear").val() === "" || $("#GregorianDateMonth").val() === "" || $("#GregorianDateDay").val() === "") {
alert("You must enter a complete date first!")
return;
}
var year = parseFloat($("#GregorianDateYear").val());
var month = parseFloat($("#GregorianDateMonth").val());
var day = parseFloat($("#GregorianDateDay").val());
var hour = parseFloat($("#GregorianDateHour").val());
var minute = parseFloat($("#GregorianDateMinute").val());
var second = parseFloat($("#GregorianDateSecond").val());
if(surfaceEra == "BCE") {
year = -1 * year + 1;
}
if(meridian === "PM" && hour < 12) {
hour = hour + 12;
}
if(meridian === "AM" && hour === 12) {
hour = 0;
}
var surfaceDate = new Date(year, month - 1, day, hour, minute, second);
surfaceDate.setFullYear(year);
var cavernDate = new DniDate();
cavernDate.setFromSurfaceDate(surfaceDate, false);
$("#DniDate").val(cavernDate.toString());
});
$("#ConvertCavernToSurfaceDate").on("click", function(e) {
e.preventDefault();
if($("#DniDateHahr").val() === "" || $("#DniDateVailee").val() === "" || $("#DniDateYahr").val() === "") {
alert("You must enter a complete date first!");
return;
}
var hahr = parseFloat($("#DniDateHahr").val());
var vailee = parseFloat($("#DniDateVailee").val());
var yahr = parseFloat($("#DniDateYahr").val());
var gartahvo = parseFloat($("#DniDateGartahvo").val());
var tahvo = parseFloat($("#DniDateTahvo").val());
var gorahn = parseFloat($("#DniDateGorahn").val());
var prorahn = parseFloat($("#DniDateProrahn").val());
if(dniEra == "BE") {
hahr = hahr * -1;
}
var cavernDate = new DniDate(hahr, vailee, yahr, gartahvo, tahvo, gorahn, prorahn);
var surfaceDate = cavernDate.toSurfaceDate();
$("#SurfaceDate").val(surfaceDate.toUTCString());
$("#SurfaceDateCavern").val(cavernDate.toCavernDateTimeString());
$("#SurfaceDateLocal").val(surfaceDate.toString());
});
</script>
</body>
</html>