27 CSS Calendar Designs 23 / 27

Bento Grid Style Booking System

Apple-style asymmetric bento on a 7-column grid.

CSS + JS MIT licensed
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The code

<div class="cal23">
  <div class="cal23__wrap">

    <div class="cal23__head">
      <div>
        <div class="cal23__title">June <span>2026</span></div>
        <div class="cal23__sub">Bento booking · 4 of 7 days available</div>
      </div>
      <div class="cal23__nav">
        <div class="cal23__nav-btn">‹</div>
        <div class="cal23__nav-btn">›</div>
      </div>
    </div>

    <!-- Bento: showing the current week with asymmetric emphasis -->
    <div class="cal23__bento" id="cal23Bento">

      <!-- TODAY hero spans 2x2 -->
      <div class="cal23__cell cal23__cell--today">
        <div class="cal23__today-top">
          <div>
            <div class="cal23__today-n">8</div>
            <div class="cal23__today-label">Sunday · Today</div>
          </div>
          <div class="cal23__today-badge">3 events</div>
        </div>
        <div class="cal23__today-events">
          <div class="cal23__today-ev">10:00 Sprint</div>
          <div class="cal23__today-ev">14:00 Launch</div>
        </div>
      </div>

      <!-- Mon 9 -->
      <div class="cal23__cell weekend">
        <div class="cal23__n">9</div>
        <div class="dow-mini">Mon</div>
        <div class="cal23__dots"><span style="background:var(--accent2)"></span></div>
      </div>

      <!-- Tue 10 -->
      <div class="cal23__cell">
        <div class="cal23__n">10</div>
        <div class="dow-mini">Tue</div>
      </div>

      <!-- Wed 11: event-rich 2x1 -->
      <div class="cal23__cell cal23__cell--2x1 cal23__cell--event">
        <div style="display:flex;align-items:flex-start;justify-content:space-between">
          <div><div class="cal23__n">11</div><div class="dow-mini">Wed</div></div>
        </div>
        <div class="cal23__ev-row">
          <div class="cal23__ev-icon" style="background:rgba(244,63,94,0.12);color:var(--rose)">🚀</div>
          <div class="cal23__ev-text">
            <div class="cal23__ev-name">Product Launch</div>
            <div class="cal23__ev-time">2:00 PM · All-hands</div>
          </div>
        </div>
      </div>

      <!-- Thu 12 -->
      <div class="cal23__cell">
        <div class="cal23__n">12</div>
        <div class="dow-mini">Thu</div>
      </div>

      <!-- Fri 13: progress ring cell 1x2 -->
      <div class="cal23__cell cal23__cell--1x2">
        <div style="display:flex;align-items:flex-start;justify-content:space-between">
          <div><div class="cal23__n">13</div><div class="dow-mini">Fri</div></div>
        </div>
        <div class="cal23__ring-wrap">
          <div style="position:relative;width:60px;height:60px">
            <svg class="cal23__ring" width="60" height="60" viewBox="0 0 60 60">
              <circle class="cal23__ring-bg" cx="30" cy="30" r="24"></circle>
              <circle class="cal23__ring-fg" cx="30" cy="30" r="24" stroke="var(--green)" style="--target:45.2; stroke-dashoffset:150.8"></circle>
            </svg>
            <div class="cal23__ring-label">70%</div>
          </div>
        </div>
      </div>

      <!-- Sat 14 -->
      <div class="cal23__cell weekend">
        <div class="cal23__n">14</div>
        <div class="dow-mini">Sat</div>
        <div class="cal23__dots"><span style="background:var(--amber)"></span><span style="background:var(--accent)"></span></div>
      </div>

      <!-- Sun 15 -->
      <div class="cal23__cell weekend">
        <div class="cal23__n">15</div>
        <div class="dow-mini">Sun</div>
      </div>

      <!-- Mon 16 -->
      <div class="cal23__cell">
        <div class="cal23__n">16</div>
        <div class="dow-mini">Mon</div>
      </div>

      <!-- Tue 17: event 2x1 -->
      <div class="cal23__cell cal23__cell--2x1 cal23__cell--event">
        <div><div class="cal23__n">17</div><div class="dow-mini">Tue</div></div>
        <div class="cal23__ev-row">
          <div class="cal23__ev-icon" style="background:rgba(6,182,212,0.12);color:var(--accent2)">📊</div>
          <div class="cal23__ev-text">
            <div class="cal23__ev-name">Demo Day + Q2 Report</div>
            <div class="cal23__ev-time">11:00 AM · 2 sessions</div>
          </div>
        </div>
      </div>

      <!-- Wed 18 -->
      <div class="cal23__cell">
        <div class="cal23__n">18</div>
        <div class="dow-mini">Wed</div>
      </div>

    </div>

  </div>
</div>
.cal23, .cal23 *, .cal23 *::before, .cal23 *::after {
  box-sizing: border-box; margin: 0; padding: 0;
}
.cal23 ::selection { background: #111; color: #fff; }

.cal23 {
  --bg:     #ececef;
  --card:   #ffffff;
  --ink:    #18181b;
  --ink2:   #71717a;
  --ink3:   #a1a1aa;
  --line:   #e4e4e7;
  --accent: #4f46e5;
  --accent2:#06b6d4;
  --green:  #10b981;
  --amber:  #f59e0b;
  --rose:   #f43f5e;

  font-family: 'Geist', -apple-system, sans-serif;
  background: var(--bg);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 20px;
  color: var(--ink);
}

@keyframes cal23-in {
  from { opacity: 0; transform: translateY(14px) scale(0.99); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes cal23-ring {
  to { stroke-dashoffset: var(--target); }
}

.cal23__wrap {
  max-width: 720px;
  width: 100%;
  animation: cal23-in 0.5s ease both;
}

/* ── Header ── */
.cal23__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 16px;
  padding: 0 2px;
}
.cal23__title { font-size: 28px; font-weight: 700; letter-spacing: -0.02em; }
.cal23__title span { color: var(--ink3); font-weight: 500; }
.cal23__sub { font-size: 13px; color: var(--ink2); margin-top: 2px; }
.cal23__nav { display: flex; gap: 6px; }
.cal23__nav-btn {
  width: 38px; height: 38px; border-radius: 12px;
  background: var(--card); border: 1px solid var(--line);
  cursor: pointer; color: var(--ink2); font-size: 15px;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.18s; user-select: none;
}
.cal23__nav-btn:hover { border-color: var(--ink); color: var(--ink); }

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   BENTO GRID — asymmetric spans.
   7 base columns; special cells span
   2×2 / 2×1 / 1×2 for the bento look.
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.cal23__bento {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  grid-auto-rows: 78px;
  gap: 8px;
}

.cal23__cell {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 12px;
  cursor: pointer;
  transition: all 0.18s;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.cal23__cell:hover {
  border-color: var(--ink);
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(24,24,27,0.1);
}
.cal23__cell.other { background: transparent; border-color: transparent; pointer-events: none; }
.cal23__cell.other .cal23__n { color: var(--ink3); opacity: 0.5; }

.cal23__n { font-size: 16px; font-weight: 600; line-height: 1; }
.cal23__cell .dow-mini { font-size: 10px; color: var(--ink3); font-weight: 500; margin-top: 2px; }

/* span helpers */
.cal23__cell--2x2 { grid-column: span 2; grid-row: span 2; }
.cal23__cell--2x1 { grid-column: span 2; }
.cal23__cell--1x2 { grid-row: span 2; }

/* ── TODAY: big 2×2 hero cell ── */
.cal23__cell--today {
  grid-column: span 2; grid-row: span 2;
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  border-color: transparent;
  color: #fff;
  padding: 16px;
  justify-content: space-between;
}
.cal23__cell--today:hover { box-shadow: 0 14px 32px rgba(79,70,229,0.4); }
.cal23__today-top { display: flex; align-items: flex-start; justify-content: space-between; }
.cal23__today-n { font-size: 40px; font-weight: 800; line-height: 0.9; }
.cal23__today-badge {
  font-size: 10px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase;
  background: rgba(255,255,255,0.2); padding: 4px 9px; border-radius: 20px;
}
.cal23__today-label { font-size: 12px; opacity: 0.8; }
.cal23__today-events { display: flex; gap: 5px; margin-top: 8px; }
.cal23__today-ev {
  flex: 1; background: rgba(255,255,255,0.16); border-radius: 8px; padding: 6px 8px;
  font-size: 10px; font-weight: 500;
}

/* progress ring cell (an event with a goal) */
.cal23__ring-wrap { display: flex; align-items: center; justify-content: center; flex: 1; }
.cal23__ring { transform: rotate(-90deg); }
.cal23__ring-bg { fill: none; stroke: var(--line); stroke-width: 6; }
.cal23__ring-fg { fill: none; stroke-width: 6; stroke-linecap: round; stroke-dasharray: 150.8;
  animation: cal23-ring 1.1s cubic-bezier(0.22,1,0.36,1) forwards; }
.cal23__ring-label {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  font-size: 13px; font-weight: 700;
}

/* event-rich 2x1 cell */
.cal23__cell--event { justify-content: space-between; }
.cal23__cell--event .cal23__ev-row { display: flex; align-items: center; gap: 6px; margin-top: auto; }
.cal23__ev-icon { width: 24px; height: 24px; border-radius: 7px; display: flex; align-items: center; justify-content: center; font-size: 13px; flex-shrink: 0; }
.cal23__ev-text { min-width: 0; }
.cal23__ev-name { font-size: 12px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cal23__ev-time { font-size: 10px; color: var(--ink2); }

/* selected */
.cal23__cell.selected { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent); }

/* mini event dots */
.cal23__dots { display: flex; gap: 3px; margin-top: auto; }
.cal23__dots span { width: 5px; height: 5px; border-radius: 50%; }

/* corner pill for weekend */
.cal23__cell.weekend .cal23__n { color: var(--accent); }

@media (max-width: 600px) {
  .cal23__bento { grid-auto-rows: 64px; gap: 6px; }
  .cal23__today-n { font-size: 30px; }
  .cal23__title { font-size: 22px; }
}
@media (prefers-reduced-motion: reduce) {
  .cal23 * { animation: none !important; transition: none !important; }
}
document.querySelectorAll('#cal23Bento .cal23__cell:not(.other):not(.cal23__cell--today)').forEach(cell => {
  cell.addEventListener('click', function() {
    document.querySelectorAll('#cal23Bento .cal23__cell').forEach(c => c.classList.remove('selected'));
    this.classList.add('selected');
  });
});

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