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3.3 KiB
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<title>Date — Ludic</title>
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<meta name="description" content="Calendar days on the proleptic Gregorian calendar (UTC).">
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<header class="nav"><div class="wrap nav-in"><a class="brand" href="index.html"><span class="logo">L</span> Ludic</a><button class="nav-toggle" aria-label="Toggle menu" aria-expanded="false">☰</button><nav class="nav-links"><a href="index.html">Home</a><a href="api.html">API Reference</a><a class="nav-cta" href="https://git.workshopsoft.io/workshopsoft/ludic">Source ↗</a></nav></div></header>
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<div class="crumbs"><a href="api.html">API Reference</a> <span>›</span> <span class="here">Date</span></div>
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<div class="item-head"><span class="kind-badge kind-namespace">namespace</span><h1 id="top">Date</h1></div>
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<p class="ns-blurb">Calendar days on the proleptic Gregorian calendar (UTC). A <code>Date</code> is stored as a plain <code>int</code>: the count of days since 1970-01-01, so shifting a date by whole days is ordinary integer arithmetic and two dates subtract to a day count. Build one with <code>Date.new</code>, read its parts with <code>year</code>/<code>month</code>/<code>day</code>/<code>weekday</code>. Every operation is deterministic integer math — no leap seconds, no timezone, no floating point.</p>
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<div class="ns-methods"><a class="ns-method" href="date-new.html"><code class="nm-sig">Date.new(year, month, day) -> int</code><span class="nm-tip">A calendar day as days-since-1970.</span></a><a class="ns-method" href="date-year.html"><code class="nm-sig">Date.year(date) -> int</code><span class="nm-tip">The calendar year of a date.</span></a><a class="ns-method" href="date-month.html"><code class="nm-sig">Date.month(date) -> int</code><span class="nm-tip">The month (1-12) of a date.</span></a><a class="ns-method" href="date-day.html"><code class="nm-sig">Date.day(date) -> int</code><span class="nm-tip">The day of the month (1-31) of a date.</span></a><a class="ns-method" href="date-weekday.html"><code class="nm-sig">Date.weekday(date) -> int</code><span class="nm-tip">Day of the week, 0=Sunday..6=Saturday.</span></a><a class="ns-method" href="date-is_leap.html"><code class="nm-sig">Date.is_leap(year) -> bool</code><span class="nm-tip">True if the year is a leap year.</span></a><a class="ns-method" href="date-days_in_month.html"><code class="nm-sig">Date.days_in_month(year, month) -> int</code><span class="nm-tip">Number of days in a given month.</span></a><a class="ns-method" href="date-to_epoch.html"><code class="nm-sig">Date.to_epoch(date) -> int</code><span class="nm-tip">Midnight UTC of the day, as a DateTime.</span></a><a class="ns-method" href="date-add_days.html"><code class="nm-sig">Date.add_days(date, n) -> int</code><span class="nm-tip">The date n days later (n may be negative).</span></a><a class="ns-method" href="date-diff_days.html"><code class="nm-sig">Date.diff_days(a, b) -> int</code><span class="nm-tip">Whole days from b to a (a - b).</span></a></div>
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