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mcal: explain what Tzolkʼin is

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Quantum 2025-07-18 03:22:31 -04:00
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<h4 class="card-title">How does it work?</h4> <h4 class="card-title">How does Tzolkʼin work?</h4>
<p class="lead">A year consists of 12 months of 30 days each, divided into three <em>décades</em> of 10 days <p class="lead">The Tzolkʼin is composed from two concurrent cycles&mdash;the number 1 to 13, and a list of
each, followed by 5 complementary days (6 in leap years).</p> 20 day names.</p>
<p>The year starts on the day of the autumnal equinox at the Paris Observatory (longitude 2°20′14.03″ E). A <p>The day name are: Imix, Ikʼ, Akʼbʼal, Kʼan, Chikchan, Kimi, Manikʼ, Lamat, Muluk, Ok, Chuwen, Ebʼ, Bʼen,
leap year follow directly from this definition: a year is a leap year when the next autumnal equinox Ix, Men, Kibʼ, Kabʼan, Etzʼnabʼ, Kawak, and Ajaw.</p>
happens 366 days later instead of the normal 365. By this definition, the year will <b>never</b> drift <p>Note that the day name and number cycles are completely independent and advance concurrently. This means
with respect to the seasons.</p> that 1 Imix is followed by 2 Ikʼ and so on. There is no definite start or end to this cycle, but day
<p>The 12 months are: <em>Vendémiaire</em>, <em>Brumaire</em>, <em>Frimaire</em>, <em>Nivôse</em>, <em>Pluviôse</em>, names repeat every 260 days, which is the least common multiple of 13 and 20.</p>
<em>Ventôse</em>, <em>Germinal</em>, <em>Floréal</em>, <em>Prairial</em>, <em>Messidor</em>, <em>Thermidor</em>,
<em>Fructidor.</em> Every three months represent a season, and the endings of the names reflect this
fact.</p>
<p>The complementary days are: <em>la Fête de la Vertu</em>, <em>la Fête du Génie</em>, <em>la Fête du
Travail</em>, <em>la Fête de l'Opinion</em>, <em>la Fête des Récompenses,</em> and <em>la Fête de la
Révolution</em> (leap years only).</p>
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