JQuery :: Removing Child Element From TD

I'm using the following code that adds to <a> tags to each <td> inside a table.
$(document).ready(function() {
$('.calendar td:not(.notinmonth.)').each(function() {
$(this).append('<a href="#" class="available am">AM: Available</a>').append('<a href="#" class="available pm">PM: Available</a>');
});
$('.calendar td:not(.notinmonth.)').each(function() {
$(this).has('.event').remove('.am');
});
});

The second half of the code looks to see if any of the cells contain an element with class 'event'. If one exists, then the '.am' anchor should be removed. However this does not appear to be happening. After carrying out a few tests with the 'alert' function, it looks as though the script thinks that every cell contains a '.event' element, but I have no idea why! Not only that, it doesn't remove the '.am' link from any of them.

Here is the markup for the table (the cell with 'Day 9' in it is the only one that should match having an '.event' element:
<table class="calendar"><thead>
<tr><th>Mon</th><th>Tue</th><th>Wed</th><th>Thu</th><th>Fri</th>
<th class="weekend">Sat</th><th class="weekend">Sun</th></tr>
</thead><tbody>
<tr><td class="notinmonth"></td><td class="notinmonth"> .....