JSFiddle - React, Tailwind, and code Playground
HTML
<form action="" method="post">
<h4>Broken</h4>
<input type="datetime-local" name="pub_date" value="2013-10-09T15:38:15" class="pubdate">
<button type="submit" class="btn">Submit</button>
</form>
<form action="" method="post">
<h4>Works</h4>
<input type="datetime-local" name="pub_date" value="2013-10-09T15:38:00" class="pubdate">
<button type="submit" class="btn">Submit</button>
</form>