Capture close event on Bootstrap Modal

I have a Bootstrap Modal to select events. If the user clicks on the X button or outside the modal, I would like to send them to the default event. How can I capture these events?

This is my HTML code:

<div class="modal" id="myModal">
    <div class="modal-dialog">
        <div class="modal-content event-selector">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-hidden="true">x</button>
                <center><h1 class="modal-title event-selector-text">Select an Event</h1><center>
            </div>
            <div class="container"></div>
            <div class="modal-body">
                <div class="event-banner">
                    <a href="/?event=1">
                        <img src="<?php echo IMAGES_EVENT1_LOGO; ?>" width="100%">
                    </a>
                </div>
                <div class="event-banner">
                    <a href="/?event=2">
                        <img src="<?php echo IMAGES_EVENT2_LOGO; ?>" width="100%">
                    </a>
                </div>
            </div>
        </div>
    </div>
</div>

This is very similar to another stackoverflow article, Bind a function to Twitter Bootstrap Modal Close. Assuming you are using some version of Bootstap v3 or v4, you can do something like the following:

$("#myModal").on("hidden.bs.modal", function () {
    // put your default event here
});