JSFiddle - React, Tailwind, and code Playground

HTML

<p id="demo">Click the button to check if now is working hours</p>

<p id="hday">Day</p>
<p id="hhour">Hour</p>
<p id="hminutes">Minutes</p>


<button onclick="myFunction()">Check now</button>

<script>



function myFunction()
{
	var now = new Date();
	var hour = now.getHours();
	var day = now.getDay();
	var minutes = now.getMinutes();
  
	document.getElementById("hday").innerHTML = day;
	document.getElementById("hhour").innerHTML = hour;
	document.getElementById("hminutes").innerHTML = minutes;

//weekdays  0==Sunday 1==Monday 2==Tuesday 3==Wednesday 4==Thurs 5==Friday 6==Sat
//Not Friday or Saturday 
if ((day != 5) && (day != 6)){

   if ((hour >= 9) && (hour < 17 )) {
      //it's in schedule
	  document.getElementById("demo").innerHTML = "Office is open";
   }
}
   else
   {
	document.getElementById("demo").innerHTML = "Office is closed";;
   }
}


</script>