<script src=" http://code.jquery.com/jquery-1.8.2.min.js"></script>

<script type="text/javascript">

 window.setInterval(function(){

        var current = new Date();

        var linkOneStartDate = new Date("March 6, 2019 12:57:15")

        var linkOneExpirationDate = new Date("March 7, 2019 12:58:00")

 if (current.getTime() > linkOneStartDate.getTime()) && current.getTime() < linkOneExpirationDate.getTime()) {

            $('#linkOne').show();

        }

        else {

            $('#linkOne').hide();

        }

        });

</script>

<div id="linkOne" style="display:none">

        <p><a href=" https://www.nfl.com/"><img src=" https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcS43QkqkiOwhT8fN0AiOxz3zmXpsARGOEQsutv4JSQtyp_OipWXWA" alt="wrongFootball" width="400px"></a></p>

        </div>

 </div>