Coould not use h-events on the to-do list

I tried:

<div class="h-event">
<time datetime="2019-01-02">2019-01-02</time></p>
<ul>
<li>open pedagogy book 🍅🍅🍅🍅🍅🍅🍅🍅</li>
<li>design EDU 407 class 🍅🍅🍅🍅</li>
<li>Ethics in Comp Sci Grant 🍅🍅🍅🍅</li>
</ul>
</div>
<div class="h-event">
<time datetime="2019-01-03">2019-01-03</time>
<ul>
<li>lost Internet most of day, kind of a wash</li>
<li>Spent 🍅🍅🍅 on Open Pedagogy</li>
</ul>
</div>
<div class="h-event">
<time datetime="2019-01-04">2019-01-04</time>
<ul>
<li>open pedagogy book 🍅🍅🍅🍅🍅🍅🍅🍅</li>
<li>Ethics in Comp Sci Grant 🍅🍅🍅🍅</li>
</ul>
</div>
<div class="h-event">
<time datetime="2019-01-04">2019-01-04</time>
<ul>
<li><time datetime="08:45:00">8:45</time> 🏫 drop off</li>
<li><time datetime="10:00:00">10:00</time> 🎓 arrive</li>
<li><time datetime="13:00:00">1:00</time> 🗣 meeting about Computer Science ethics grant</li>
<li> 🍅🍅 coordinator stuf- scheduling interviews, checking accounts</li>
<li>🍅 check in with outstanding assigments</li>
<li>🍅 finish LCGNH migration and receipts</li>
<li><time datetime="14:00:00">2:00</time> depart 🎓</li>
<li><time datetime="15:15:00">3:15</time> 🏫 pick up</li>
</ul>
</div>

But the CMS, or TinyMCE removes the div. I find this annoying. In the end Known is still a CMS and all those features come with restraints.