class="st"> &quot;2018-06-01 13:00&quot;</span> <span class="op">&amp;</span>
<span class="st">                           </span>timestamp <span class="op">&lt;</span><span class="st"> &quot;2018-06-01 14:00&quot;</span> <span class="op">&amp;</span>
<span class="st">                           </span>id <span class="op">==</span><span class="st"> </span><span class="dv">1</span>)
d<span class="op">$</span>timestamp &lt;-<span class="st"> </span>lubridate<span class="op">::</span><span class="kw">round_date<