15-12-11 08:00:00'</span>, <span class="dt">tz =</span> <span class="st">'EST'</span>),</a>
<a class="sourceLine" id="cb14-4" data-line-number="4">          <span class="dt">colname =</span> <span class="st">'daystart'</span>) <span class="op">%&gt;%</span><span class="st"> </span></a>
<a class="sourceLine" id="cb14-5" data-line-number="5"><span class="st">  </span><span class="kw"><a href="https://dplyr.tidyverse.org/reference/group_by.html">group_by</a></span>(daystart) <span class="op">%&gt;%</span><span