Calendar

This trick must be used when we need to calculate previous date from the given date.

On 15 April 1998 was Wednesday. so What was The day on 7 May 1996.

First of all we must Know:

0th odd day=Sunday

1th odd day=Monday

2th odd day=Tuesday

3th odd day=Wednesday

4th odd day=Thursday

5th odd day=Friday

6th odd day=Saturday

STEP 1 :

First of all we calculate the total number of days between the date 7 May 1996 to 15 April 1998

Number of Days in1996
May 24
Jun 30
Jul 31
Aug 31
Sep 30
Oct 31
Nov 30
Dec 31
Number of Days in1997
Jan 31
Feb 28
Mar 31
Apr 30
May 31
Jun 30
Jul 31
Aug 31
Sep 30
Oct 31
Nov 30
Dec 31
Number of Days in1998
Jan 31
Feb 28
Mar 31
Apr 15
Total No. of Days708


STEP 2 :

Now we calculate the odd day number and for that we have to divide the total number of days with 7(1week=7days) and reminder will be our odd day number.

708 / 7 = 1 odd days (1 is Reminder)


STEP 3 :

As we know given day is Wednesday which is 3th odd day


Let the odd Number associated with the day on 7 May 1996 is 'X'
Wednesday on 15 April 1998 = 3 odd day
so 'X + 1 = 3'
Now we have to put the value of 'X' as after dividing 'X + 1' with '7' reminder will be '3'
so 'X = 2' and day is 'Tuesday'



Watch Youtube video of Calendar for better understanding.