To calculate the DAY of a specific DATE, we should know the following;
Ordinary
Year:It is a year which is not a
leap year i.e., the year should not be divisible by 4. An Ordinary year has 365
days.
Leap
year: If a year is divisible
by 4, it is known as leap year, if it is not a century. Every 4th
century is a leap year and no other century is a leap year. A leap year has 366
days.
Odd
days: We need to use the
concept of ‘Odd Days’ to find the day of a week on a given date. In a given
year, the number of days more than the complete weeks are called odd days.
Examples:
* 1 ordinary year = 365
days = 52 weeks + 1 day
Therefore, 1 ordinary year has 1 odd day.
* 1 leap year = 366
days = 52 weeks + 2 days
Therefore, 1 leap year has 2 odd days.
Exercises:
1.
January 1, 2008 is Tuesday. What day of the week lies on January
1, 2009 ?
(A)
Monday
(B)
Wednesday
(C)
Thursday
(D)
Sunday
Answer: (C)
Explanation: The year
2008 is a leap year and it has 2 odd days. Therefore, 1st day of the
year is 2 days beyond Tuesday. Hence, the correct day is ‘Thursday’.
2.
January 1, 2007 is Monday.
What day of the week lies on January 1, 2008 ?
(A)
Monday
(B)
Tuesday
(C)
Wednesday
(D)
Sunday
Answer: (C)
Explanation: The year
2007 is not a leap year and it has 1 odd day. Therefore, 1st day of
the year is 1 day beyond Monday. Hence, the correct day is ‘Tuesday’.
