tools/dates.html at main · jubilancy/tools · GitHub

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<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1" />
  <title>Date Tools | tools.eliana.lol</title>
  <link rel="stylesheet" href="../global.css" />
  <link rel="icon" type="image/x-icon" href="../favicon.svg" />
  <style>
    .tool-layout { display: flex; flex-direction: column; gap: 24px; }
    .action-bar { display: flex; flex-wrap: wrap; gap: 10px; margin: 10px 0; }
    label { display: block; font-size: 0.7rem; text-transform: uppercase; font-weight: bold; color: var(--puny); margin-bottom: 5px; }
    .card { border: 1px solid var(--puny); padding: 14px; }
    .card h2 { font-size: 0.9rem; text-transform: uppercase; margin: 0 0 12px 0; padding-bottom: 6px; border-bottom: 1px solid var(--puny); }
    .result { font-size: 0.9rem; margin-top: 8px; min-height: 1.4rem; font-weight: bold; }
    .result.puny { font-weight: normal; }
    select { background: var(--bg); color: var(--text); border: 1px solid var(--puny); font-family: monospace; padding: 4px 8px; }
    input[type=date], input[type=datetime-local] { background: var(--bg); color: var(--text); border: 1px solid var(--puny); font-family: monospace; padding: 6px 8px; }
    .formats { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; font-size: 0.8rem; }
    .formats span { color: var(--puny); }
    .formats strong { font-family: monospace; }
    #live-clock { font-size: 1.8rem; font-weight: bold; text-align: center; padding: 16px; border: 1px solid var(--puny); letter-spacing: 2px; }
  </style>
</head>
<body>
  <nav>
    <div class="left"><a href="../index.html">home</a> | <a href="../extra.html">extra</a> | <a href="../credits.html">credits</a> | <a href="../changelog.html">logs</a></div>
    <div class="right"><button id="theme-toggle">[theme]</button> | <a href="https://eliana.lol">site</a></div>
  </nav>
  <main>
    <h1>Date Tools</h1>
    <p class="puny">Format dates, calculate differences, convert timezones. Powered by Day.js.</p>
    <div class="tool-layout">

      <div id="live-clock"></div>

      <div class="card">
        <h2>Format a date</h2>
        <label>Date</label>
        <input type="datetime-local" id="fmt-date" />
        <label style="margin-top:10px">Format string</label>
        <input type="text" id="fmt-str" value="MMMM D, YYYY [at] h:mm A" />
        <div class="result" id="fmt-result"></div>
        <div class="formats" style="margin-top:10px">
          <span>YYYY</span><strong>2026</strong>
          <span>MM</span><strong>06</strong>
          <span>DD</span><strong>14</strong>
          <span>dddd</span><strong>Sunday</strong>
          <span>h:mm A</span><strong>2:30 PM</strong>
          <span>HH:mm</span><strong>14:30</strong>
          <span>x</span><strong>unix ms</strong>
          <span>Q</span><strong>quarter</strong>
        </div>
        <div class="action-bar"><button onclick="formatDate()">Format</button></div>
      </div>

      <div class="card">
        <h2>Date difference</h2>
        <div style="display:grid;grid-template-columns:1fr 1fr;gap:12px">
          <div><label>From</label><input type="date" id="diff-from" /></div>
          <div><label>To</label><input type="date" id="diff-to" /></div>
        </div>
        <div class="action-bar"><button onclick="calcDiff()">Calculate</button></div>
        <div class="result" id="diff-result"></div>
      </div>

      <div class="card">
        <h2>Relative time</h2>
        <label>Date</label>
        <input type="datetime-local" id="rel-date" />
        <div class="action-bar"><button onclick="calcRelative()">From now</button></div>
        <div class="result" id="rel-result"></div>
      </div>

      <div class="card">
        <h2>Unix timestamp</h2>
        <label>Timestamp (seconds or ms)</label>
        <input type="text" id="unix-in" placeholder="e.g. 1700000000" />
        <div class="action-bar">
          <button onclick="fromUnix()">Convert to date</button>
          <button onclick="toUnix()">Now → Unix</button>
        </div>
        <div class="result" id="unix-result"></div>
      </div>

    </div>
  </main>
  <footer style="margin-top: 4rem; text-align: center" class="puny">© 2026 eliana.lol • <a href="../credits.html">credits</a></footer>
  <script src="https://cdn.jsdelivr.net/npm/dayjs@1.11.10/dayjs.min.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/dayjs@1.11.10/plugin/relativeTime.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/dayjs@1.11.10/plugin/duration.js"></script>
  <script>
    const htmlEl = document.documentElement;
    const toggle = document.getElementById('theme-toggle');
    const saved = localStorage.getItem('theme') || (window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light');
    htmlEl.setAttribute('data-theme', saved);
    if (toggle) toggle.innerText = saved === 'dark' ? '[light]' : '[dark]';
    if (toggle) toggle.onclick = () => { const now = htmlEl.getAttribute('data-theme'); const next = now === 'dark' ? 'light' : 'dark'; htmlEl.setAttribute('data-theme', next); localStorage.setItem('theme', next); toggle.innerText = next === 'dark' ? '[light]' : '[dark]'; };

    dayjs.extend(window.dayjs_plugin_relativeTime);
    dayjs.extend(window.dayjs_plugin_duration);

    // Live clock
    function updateClock() { document.getElementById('live-clock').textContent = dayjs().format('ddd, MMM D YYYY · HH:mm:ss'); }
    updateClock(); setInterval(updateClock, 1000);

    // Pre-fill inputs with now
    const now = dayjs().format('YYYY-MM-DDTHH:mm');
    const today = dayjs().format('YYYY-MM-DD');
    document.getElementById('fmt-date').value = now;
    document.getElementById('rel-date').value = now;
    document.getElementById('diff-from').value = today;
    document.getElementById('diff-to').value = dayjs().add(30, 'day').format('YYYY-MM-DD');

    function formatDate() {
      const d = document.getElementById('fmt-date').value;
      const fmt = document.getElementById('fmt-str').value;
      if (!d) return;
      document.getElementById('fmt-result').textContent = dayjs(d).format(fmt);
    }

    function calcDiff() {
      const from = dayjs(document.getElementById('diff-from').value);
      const to = dayjs(document.getElementById('diff-to').value);
      const days = to.diff(from, 'day');
      const weeks = to.diff(from, 'week');
      const months = to.diff(from, 'month');
      document.getElementById('diff-result').textContent = `${Math.abs(days)} days · ${Math.abs(weeks)} weeks · ${Math.abs(months)} months ${days < 0 ? '(past)' : ''}`;
    }

    function calcRelative() {
      const d = document.getElementById('rel-date').value;
      if (!d) return;
      document.getElementById('rel-result').textContent = dayjs(d).fromNow();
    }

    function fromUnix() {
      const ts = parseInt(document.getElementById('unix-in').value.trim());
      if (isNaN(ts)) return;
      const ms = ts > 1e10 ? ts : ts * 1000;
      document.getElementById('unix-result').textContent = dayjs(ms).format('MMMM D, YYYY HH:mm:ss');
    }

    function toUnix() {
      const ts = dayjs().unix();
      document.getElementById('unix-in').value = ts;
      document.getElementById('unix-result').textContent = `Now = ${ts} (seconds) · ${dayjs().valueOf()} (ms)`;
    }

    formatDate(); calcDiff();
  </script>
</body>
</html>