awesome.js

//Prepare greeting
var today = new Date();
if (today.getDay()==0) day="Sunday";
if (today.getDay()==1) day="Monday";
if (today.getDay()==2) day="Tuesday";
if (today.getDay()==3) day="Wednesday";
if (today.getDay()==4) day="Thursday";
if (today.getDay()==5) day="Friday";
if (today.getDay()==6) day="Saturday";
if (today.getMonth()==0) month="January";
if (today.getMonth()==1) month="February";
if (today.getMonth()==2) month="March";
if (today.getMonth()==3) month="April";
if (today.getMonth()==4) month="May";
if (today.getMonth()==5) month="June";
if (today.getMonth()==6) month="July";
if (today.getMonth()==7) month="August";
if (today.getMonth()==8) month="September";
if (today.getMonth()==9) month="October";
if (today.getMonth()==10) month="November";
if (today.getMonth()==11) month="December";
var year = today.getYear();
if (year < 50) {
 year = 0+year;
}else{
 year = 0+year;
}
if (year == 100) year = 2000
if (year == 101) year = 2001
if (year == 102) year = 2002
if (year == 103) year = 2003
if (year == 104) year = 2004
if (year == 105) year = 2005
if (year == 106) year = 2006
if (year == 107) year = 2007
if (year == 108) year = 2008
if (year == 109) year = 2009
if (year == 110) year = 2010
if (year == 111) year = 2011
if (year == 112) year = 2012
if (year == 113) year = 2013
if (year == 114) year = 2014
if (year == 115) year = 2015
if (year == 116) year = 2016
if (year == 117) year = 2017
if (year == 118) year = 2018
if (year == 119) year = 2019
var hour =today.getHours();
var greeting;if (hour < 6)
 greeting = "Good Early Morning!";
else if (hour < 11) 
 greeting = "Good Morning!";
else if (hour < 12) 
 greeting = "Lunch Time!";
else if (hour < 16) 
 greeting = "Good Afternoon!";
else if (hour < 18) 
 greeting = "Good Late Afternoon!";
else
 greeting = "Good Evening!";

refactor.js

//Prepare greeting
var DAYS = [
  "Sunday",
  "Monday",
  "Tuesday",
  "Wednesday",
  "Thursday",
  "Friday",
  "Saturday"
];
var MONTHS = [
  "January",
  "February",
  "March",
  "April",
  "May",
  "June",
  "July",
  "August",
  "September",
  "October",
  "November",
  "December"
];
var today = new Date();
var month = MONTHS[today.getMonth()]; 
var day = DAYS[today.getDay()];
var year = '20' + today.getYear().toString().slice(1);
var hour = today.getHours();
var greeting;

if (hour < 6) {
 greeting = "Good Early Morning!";
} else if (hour < 11) {
 greeting = "Good Morning!";
} else if (hour < 12) {
 greeting = "Lunch Time!";
} else if (hour < 16) {
 greeting = "Good Afternoon!";
} else if (hour < 18) {
 greeting = "Good Late Afternoon!";
} else {
 greeting = "Good Evening!";
}

document.write ("<H3><center>"+greeting+"<br>It is "+day+", "+month+" "+today.getDate()+" "+year+"</center></H3>");