CMPU-102 section 51 Spring 2020
Lab 2: England's strange year of 1752

The exercise today features the calendar that we use today, referred to as the 
Gregorian Calendar. In 1582, Pope Gregory enacted a calendar that was more 
accurate (how?) than the calendar in use at the time, the Julian Calendar. However, 
the King of England would have none of whatever decrees, proclamations, ideas, 
or whatever from the Vatican. Further, the new year was on March 25! 
England remained on the Julian Calendar, until 1752. Well before that year, 
King George (the guy we started a revolution against and the subject of a cool 
movie, The Madness of King George) worked with Parliament to enact a calendar change.
The details:

    January, February, and March 1 through March 24 were part of 1751 (NOT EXIST)
    March 25 was the start of 1752 (EXIST)
    April through August was, of course, 1752 (EXIST)
    September 1 and 2 were part of 1752 (EXIST)
    The day after September 2 was September 14. (EXIST)
	   (September 3-through September 13 did not exist in 1752) (NOT EXIST)
    October, November, and December were part of 1752 (EXIST)
    January 1 became the start of 1753.

Your mission: create a Calendar1752 class that allows a user to interactively specify
a month and a day. The output will tell the user that the day exists or does not exist.

The specs. Your program will:
	1. issue a welcome message "Interactive calendar for 1752 by NAME" when starting.
	(Of course, NAME is your name)
	2. print "Enter numerical month or 0 to exit: "
	3. read the month - an int - entered on the keyboard. Hint use the Scanner class
	(Don't forget to import java.util.Scanner; see chart 18 from Tuesday's lecture)
	4. check the input value. If it is zero, exit the program. Otherwise, continue.
	(in main, simply return; to exit the program execution.)
	(your program can be polite and day Good Night before exiting too!)
	5. print "Enter numberical day"
	6. read the day - also an int - entered on the keyboard.
	7. print the inputs and whether or not the day exists in 1752
	(MONTH m DAY d DOES NOT EXIST IN 1752 :(
	(MONTH m DAY d EXISTS IN 1752 :)
	8. Print a newline, a separator string "----------------------------------",
    followed by two additional newlines.
	(One way to do this: System.out.printf("\n-----------------------------------\n\n");)
	9. Return to step 2.
	
	A single class, Calendar1752, with a main method is all you need.
	(“public static void main(String[] args)”)
	
	If you don't know the "knuckle method" to determine which months have 31
	days, ask a coach or your professor.
	
	Once you get the code working, ask a coach or your professor to get lab credit.
	Please email your Calendar1752.java file to my Vassar email address.