html get date and time code example

Example 1: html date

<label for="meeting">Next meeting (August 2021):</label>
<input type="date" 
       id="meeting" 
       name="meeting"
       min="2021-08-01" 
       max="2021-08-31"
       defaultValue="2021-08-01">

Example 2: display date in javascript

<button onclick="displayDate()">The time is?</button>

<script>
function displayDate() {
  document.getElementById("demo").innerHTML = Date();
}
</script>