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@ -61,11 +61,11 @@
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<p>The idea of a monthly calendar is sort of alien to the Maya, who used two cycles to track the date and
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a modified base-20 numbering system to track the exact date:</p>
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<ul>
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<li>The <a href="https://en.wikipedia.org/wiki/Tzolk%CA%BCin"><strong>Tzolkʼin</strong></a>
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<li>The <a href="https://en.wikipedia.org/wiki/Tzolk%CA%BCin"><strong>tzolkʼin</strong></a>
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cycle, which is a 260-day cycle based on combining 20 day names with 13 numbers, used for religious
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and ceremonial events and for divination;
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</li>
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<li>The <a href="https://en.wikipedia.org/wiki/Haab%CA%BC"><strong>Haabʼ</strong></a> cycle, which is a
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<li>The <a href="https://en.wikipedia.org/wiki/Haab%CA%BC"><strong>haabʼ</strong></a> cycle, which is a
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365-day cycle consisting of 18 “months” of 20 day each, plus 5 days at the end of the
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year known as the <em>Wayebʼ</em>;
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</li>
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which counts from 0 to 17.
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</li>
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</ul>
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<p>Since the <em>Haabʼ</em> is the closest equivalent to months in the Mayan system, this calendar
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application is based on the <em>Haabʼ</em>. This poses a problem, as in the Mayan system, the Long Count
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is used to track the absolute date and the cycles of <em>Tzolkʼin</em> and <em>Haabʼ</em> are
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unnumbered. To mitigate this issue, we attempt to number the <em>Haabʼ</em> cycles, with the date of
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<p>Since the <em>haabʼ</em> is the closest equivalent to months in the Mayan system, this calendar
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application is based on the <em>haabʼ</em>. This poses a problem, as in the Mayan system, the Long Count
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is used to track the absolute date and the cycles of <em>tzolkʼin</em> and <em>haabʼ</em> are
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unnumbered. To mitigate this issue, we attempt to number the <em>haabʼ</em> cycles, with the date of
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creation in cycle 0.</p>
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</div>
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</div>
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<div class="card">
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<div class="card-body">
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<h4 class="card-title">How does Tzolkʼin work?</h4>
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<p class="lead">The Tzolkʼin is composed from two concurrent cycles—the number 1 to 13, and a list of
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20 day names.</p>
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<p>The day name are: Imix, Ikʼ, Akʼbʼal, Kʼan, Chikchan, Kimi, Manikʼ, Lamat, Muluk, Ok, Chuwen, Ebʼ, Bʼen,
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Ix, Men, Kibʼ, Kabʼan, Etzʼnabʼ, Kawak, and Ajaw.</p>
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<p>Note that the day name and number cycles are completely independent and advance concurrently. This means
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that 1 Imix is followed by 2 Ikʼ and so on. There is no definite start or end to this cycle, but day
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names repeat every 260 days, which is the least common multiple of 13 and 20.</p>
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<h4 class="card-title">How does it work?</h4>
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<p class="lead">A year consists of 12 months of 30 days each, divided into three <em>décades</em> of 10 days
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each, followed by 5 complementary days (6 in leap years).</p>
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<p>The year starts on the day of the autumnal equinox at the Paris Observatory (longitude 2°20′14.03″ E). A
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leap year follow directly from this definition: a year is a leap year when the next autumnal equinox
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happens 366 days later instead of the normal 365. By this definition, the year will <b>never</b> drift
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with respect to the seasons.</p>
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<p>The 12 months are: <em>Vendémiaire</em>, <em>Brumaire</em>, <em>Frimaire</em>, <em>Nivôse</em>, <em>Pluviôse</em>,
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<em>Ventôse</em>, <em>Germinal</em>, <em>Floréal</em>, <em>Prairial</em>, <em>Messidor</em>, <em>Thermidor</em>,
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<em>Fructidor.</em> Every three months represent a season, and the endings of the names reflect this
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fact.</p>
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<p>The complementary days are: <em>la Fête de la Vertu</em>, <em>la Fête du Génie</em>, <em>la Fête du
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Travail</em>, <em>la Fête de l'Opinion</em>, <em>la Fête des Récompenses,</em> and <em>la Fête de la
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Révolution</em> (leap years only).</p>
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</div>
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</div>
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<div class="card">
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