Counter By Text ZW.txt
Mathematics Dictionary
Dr. K. G. Shih
Keyword - Text File ZW.txt
ZW.txt - Topics starting with W
    * Website names
    * Week day : find using computer
    * Week day : find by indext table
    * ====== Topic separator
0 ** Website Names

    html .... Hypertext makeup language
    http .... Hypertext Pro
    IP ...... Internet Provider
    MSN ..... Microsoft Network
    WWW ..... World Wide Web
0 ** Week day : find by computer

    1. Method 1 : use Math Dictionary program

      a. Click progrm ABC
      b. Click Text ZW in left List Box
      c. Contents of ZW.txt load into top List Box
      d. In MD2002 **** Click here *** 11 16
        * It link to program 16 in chapter 11
        * Type in day number ...... e.g. 14
        * Type in month number .... e.g. 2
        * Type in year number ..... e.g. 2002
        * The computer return the day of week for Feburary 14 of 2002
      2. Use window's date calendar
    ** Week day by index table

    Question 2 : How to use week index ?

    [Example 1] Find day of week of 25 December of 1985

      * Index for Dec of 1985 is 5
      * Day 25 + Index number = 25 + 5 = 30
      * 30 divide by 7 = 4 and remainer 2
      * Hence it wae Tuesday.

    [Example 2] Find day of week of 7 July of 1937


      * 1937 is not in the index table. What should we do ?
      * 1937 + 28 = 1965. The year is also not in the Table
      * 1965 + 28 = 1993. The year 1993 is in table
      * Use index of 1993 for year 1937 and do it as example 1

    [Example 3] Find day of week of 25 December of 2056


      * Year 2056 is not in the table. What should we do ?
      * 2056 - 28 = 2028. The year is also not in the Table
      * 2028 - 28 = 2000. The year 2000 is in table
      * Use index of 2000 for year 2056 and do it as example 1
    Question 3 : What is the week day index table ?
    Answer. It is given as below
    Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year

    1956 ...6 ...2 ...3 ...6 ...1 ...4 ...6 ...2 ...5 ...0 ...3 ...5 1984
    1957 ...1 ...4 ...4 ...0 ...2 ...5 ...0 ...3 ...6 ...1 ...4 ...6 1985
    1958 ...2 ...5 ...5 ...1 ...3 ...6 ...1 ...4 ...0 ...2 ...5 ...0 1986
    1959 ...3 ...6 ...6 ...2 ...4 ...0 ...2 ...5 ...1 ...3 ...6 ...1 1987
    1960 ...4 ...0 ...1 ...4 ...6 ...2 ...4 ...0 ...3 ...5 ...1 ...3 1988
    1961 ...6 ...2 ...2 ...5 ...0 ...3 ...5 ...1 ...4 ...6 ...2 ...4 1989
    1962 ...0 ...3 ...3 ...6 ...1 ...4 ...6 ...2 ...5 ...0 ...3 ...5 1990

    1963 ...1 ...4 ...4 ...0 ...2 ...5 ...0 ...3 ...6 ...1 ...4 ...6 1991
    1964 ...2 ...5 ...6 ...2 ...4 ...0 ...2 ...5 ...1 ...3 ...6 ...1 1992
    1965 ...4 ...0 ...0 ...3 ...5 ...1 ...3 ...6 ...2 ...4 ...0 ...2 1993
    1966 ...5 ...1 ...1 ...4 ...6 ...2 ...4 ...0 ...3 ...5 ...1 ...3 1994
    1967 ...6 ...2 ...2 ...5 ...0 ...3 ...5 ...1 ...4 ...6 ...2 ...4 1995
    1968 ...0 ...3 ...4 ...0 ...2 ...5 ...0 ...3 ...6 ...1 ...4 ...6 1996
    1969 ...2 ...5 ...5 ...1 ...3 ...6 ...1 ...4 ...0 ...2 ...5 ...0 1997

    1970 ...3 ...6 ...6 ...2 ...4 ...0 ...2 ...5 ...1 ...3 ...6 ...1 1998
    1971 ...4 ...0 ...0 ...3 ...5 ...1 ...3 ...6 ...2 ...4 ...0 ...2 1999
    1972 ...5 ...1 ...2 ...5 ...0 ...3 ...5 ...1 ...4 ...6 ...2 ...4 2000
    1973 ...0 ...3 ...3 ...6 ...1 ...4 ...6 ...2 ...5 ...0 ...3 ...5 2001
    1974 ...1 ...4 ...4 ...0 ...2 ...5 ...0 ...3 ...6 ...1 ...4 ...6 2002
    1975 ...2 ...5 ...5 ...1 ...3 ...6 ...1 ...4 ...0 ...2 ...5 ...0 2003
    1976 ...3 ...6 ...0 ...3 ...5 ...1 ...3 ...6 ...2 ...4 ...0 ...2 2004

    1977 ...5 ...1 ...1 ...4 ...6 ...2 ...4 ...0 ...3 ...5 ...1 ...3 2005
    1978 ...6 ...2 ...2 ...5 ...0 ...3 ...5 ...1 ...4 ...6 ...2 ...4 2006
    1979 ...0 ,,,3 ...3 ...6 ...1 ...4 ...6 ...2 ...5 ...0 ...3 ...5 2007
    1980 ...1 ...4 ...5 ...1 ...3 ...6 ...1 ...4 ...0 ...2 ...5 ...0 2008
    1981 ...3 ...6 ...6 ...2 ...4 ...0 ...2 ...5 ...1 ...3 ...6 ...1 2009
    1982 ...4 ...0 ...0 ...3 ...5 ...1 ...3 ...6 ...2 ...4 ...0 ...2 2010
    1983 ...5 ...1 ...1 ...4 ...6 ...2 ...4 ...0 ...3 ...5 ...1 ...3 2011
Note : What is leap year ?
    * Year is a leap year if it is divisible by 4
    * Centenium year is not leap year if it is no divisible by 400
    * The index table is taken from p135 of Computer Mathematics
    * Why add ... ? Because Html only only one space
* Reference - Computer Mathematics by Dr. K. G. Shih. Chapter 15
[Example] Year 1900 A.D. is not leap year. Why ?

    * Year 1900 is divisible by 4
    * Year 1900 is not divisible by 400

====== Separator for first two charactor
** New key word

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Copyright © Dr. K. G. Shih. Nova Scotia, Canada.
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