HTML 5 : Source code to display Date and Time :

<script language = "JavaScript" type = "text/javascript">
 var d = new Date()
 var j = d.getDate()
 var m = d.getMonth() + 1
 var y = d.getYear()
 if (y < 999)
 y += 1900;
 var h = d.getHours()
 var mn = d.getMinutes()
 var mois, jour;
 var dayNames = new
 Array("Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday");
 if (m == 1)
 mois = " January";
 else if (m == 2)
 mois = " February";
 else if (m == 3)
 mois = " March";
 else if (m == 4)
 mois = " April";
 else if (m == 5)
 mois = " May";
 else if (m == 6)
 mois = " June";
 else if (m == 7)
 mois = " July";
 else if (m == 8)
 mois = " August";
 else if (m == 9)
 mois = " September";
 else if (m == 10)
 mois = " October";
 else if (m == 11)
 mois = " November";
 else if (m == 12)
 mois = " December";
 if (j == 1)
 jour = "1st"
 else
 jour = j;
 // Test to determine the formula to use
 if (h >= 18)
 document.write("Good evening");
 else
 document.write("Good morning");
 document.write(" and welcome to my site. ")
 document.write("Today is " + dayNames[d.getDay()] + " " + jour + " " + mois + " " + y + ", ")
 document.write("it is " + h)
 if (h < 2)
 document.write(" hour ")
 else
 document.write(" hours ")
 document.write(mn)
 if (mn < 2)
 document.write(" minute.")
 else
 document.write(" minutes.")
 </script>