https://blog.qrdn.de/quite random domain nameSat, 28 Mar 2026 00:00:00 +0100https://blog.qrdn.de/2026/thunderbird-lightning-mark-all-day-events-in-monthmulti-week-calendar-view.html<p>Thunderbird Lightning calendar in month or multi-week view should mark the empty space of days which have an all day event differently.</p> <p>Write into your <code>~/.thunderbird/&lt;profilename&gt;/chrome/userChrome.css</code> (maybe need to create the <code>chrome/</code> directory too):</p> <div class="highlight"><pre><span></span><code><span class="p">.</span><span class="nc">calendar-month-day-box-list</span><span class="p">:</span><span class="nd">has</span><span class="o">(</span><span class="nt">calendar-month-day-box-item</span><span class="o">[</span><span class="nt">status</span><span class="o">=</span><span class="nt">CONFIRMED</span><span class="o">][</span><span class="nt">allday</span><span class="o">=</span><span class="nt">true</span><span class="o">])</span><span class="w"> </span><span class="p">{</span> <span class="w"> </span><span class="k">background</span><span class="p">:</span><span class="w"> </span><span class="nb">repeating-linear-gradient</span><span class="p">(</span> <span class="w"> </span><span class="mi">-45</span><span class="kt">deg</span><span class="p">,</span> <span class="w"> </span><span class="nb">rgba …</span></code></pre></div>dragonSat, 28 Mar 2026 00:00:00 +0100tag:blog.qrdn.de,2026-03-28:/2026/thunderbird-lightning-mark-all-day-events-in-monthmulti-week-calendar-view.htmlmiscencomputerthunderbirdcustomization