 ## A NUMBER MAKES YOU AN ASTROLOGIST, by SURATH ROY, DEPARMENT OF MATHEMATICS

Given below is a SURATH ROY’s number that can help us deduce the day of the week from any given date between 1900 and 2099.

Use the following data as your value of the month:

JAN    FEB    MAR  APR    MAY  JUN    JULY AUG   SEP     OCT   NOV DEC

Non leap year  1          4          4          0          2          5          0          3          6          1          4          6

Leap year          0          3          4          0          2          5          0          3          6          1          4          6

Value the year from 1900 to 1999 =00

Value the year from 2000 to 2099 =06

How do you find out the day from a given data?

1)      First you put the value of the year                                                :

2)      Then  you put the value of the month                                           :

3)      Then  you put the last two digit of the year                                   :

4)      Next  you put the quotient arrived by dividing

the last two digit of the year by 4 (ignore the reminder)               :

5)       Last step is to put the date                                                            :

Total                                                               :

You divide the above total by 7.The remainder obtained will answer of your question –

## If it is 6, the day will be Fri day

If it is 0, the day will be Saturday

Example 1:  Find the day of 23rd February of the year 1983.

Ans:   1) First you put the value of the year                                    :           00

2) Then you put the value of the month                                :           04

3) Then you put the last two digit of the year                        :           83

4) Next you put the quotient arrived by dividing

the last two digit of the year by 4 (ignore the reminder)    :           20

5)  Last step is to put the date                                                :           23

Total                                                               :           130

When , Remainder=4

Hence the day was: Wednesday.

Example 2:  Find the day of 30th  January of the year 2016.

Ans:   1) First you put the value of the year                                    :           06

2) Then you put the value of the month                                :           00

3) Then you put the last two digit of the year                        :           16

4) Next you put the quotient arrived by dividing

the last two digit of the year by 4 (ignore the reminder)    :           04

5)  Last step is to put the date                                                :           30

Total                                                               :           56

When , Remainder=0

Hence the day was: Saturday.