Simple HTML date picker is showing not showing calendar icon!

Your html date input is given as below

<input type="date">

#Approach 1: Live Demo Link - Changing calendar icon using font-awesome icon library

input[type="date"]:before {
  color: transparent;
  background: none;
  display: block;
  font-size: 18px;
  font-family: 'FontAwesome';
  content: '\f073';
  /* This is the calendar icon in FontAwesome */
  width: 15px;
  height: 20px;
  position: absolute;
  top: 12px;
  right: 6px;
  color: #999;
}

Output: 

#Approach 2: Live Demo Link - Changing calendar icon using image.

CSS Code:

input[type="date"]::-webkit-calendar-picker-indicator {
    color: rgba(0, 0, 0, 0);
    opacity: 1;
    display: block;
    background: url(http://www.clipartbest.com/cliparts/9cz/67G/9cz67Gxgi.png) no-repeat;
    width: 20px;
    height: 20px;
  	border: 1px blue solid;
    border-width: thin;
}

Output:

This way you can overwrite your date picker, Hope it will work for you.