<script>

    var textDiv = document.getElementByID("openclosetext");
    if(textDiv)
    {
        var date = new Date();
        var day = date.getDay();
        var hour = date.getHours();

        if(day > 3 && (hour >= 12 && hour <= 17))
        {
           textDiv.innerHTML = "We are open for bizness";
        }
        else
        {
            textDiv.innerHTML = "Soz but we closed hun";
        }
    }
    else
    {
        console.log("Div with id - openclosetext - could not be found");
    }

</script>