JSFiddle - React, Tailwind, and code Playground

HTML

<div id="zillow-4" style="height:50px;"><a class="button  " href="updateScheduleRequest.php?slotid=4&amp;timeremain=110&amp;current_date=2015-11-02&amp;empnum=702">Assign Slot 4</a></div>

<div id="zillow-5" style="height:50px;"><a class="button  " href="updateScheduleRequest.php?slotid=5&amp;timeremain=110&amp;current_date=2015-11-02&amp;empnum=702">Assign Slot 5</a></div>

CSS

.disabled{
    pointer-events: none;
    cursor: default;
    opacity: 0.6;  
}

JavaScript

var date = new Date();
disableChildButtonByTime(14, 0, "zillow-5");    
disableChildButtonByTime(16, 0, "zillow-4");    

function disableChildButtonByTime(hour, minute, parentId){
    if(date.getHours() >= hour && date.getMinutes() >= minute){
	    $("#" + parentId).children(".button").addClass("disabled");
    }
}