JSFiddle - React, Tailwind, and code Playground

HTML

<div id="AsynchronousViewDefault_CalendarView">
<div class="ms-acal-header">
<div>
    <table class="ms-acal-month">
    </table>
    <div class="ms-acal-vlink">
        <table>
            <tbody>
                <tr>
                    <td><a href="javascript:void(0)" title="Add" evtid="new_item">
                        <img border="0" src="/_layouts/images/caladd.gif">Add</a></td>
                </tr>
            </tbody>
        </table>
    </div>
</div>

JavaScript

$(document).ready(function () {
        var abc = $("#AsynchronousViewDefault_CalendarView").find('a[title="Add"][evtid="new_item"]').hover(
          function () {
              $(this).attr('href', 'http://share/Lists/Calendar.aspx?P=P1');
          }
        );
    });