Important formulae and tricks and shortcuts of Calendar:
We are providing you Important Concepts and Tricks on Calendar which are usually asked in almost all competitive exams like IBPS, Govt. Exams and CAT and in quantitative aptitude of MNCs. Use these below given tricks to solve questions within minimum time. These tricks will be very helpful for your upcoming Competitive Exam.
Year Code:
16001699

6

17001799

4

18001899

2

19001999

0

20002099

6

Month Code:
Jan

Feb

Mar

April

May

June

July

Aug

Sep

Oct

Nov

Dec

0

3

3

6

1

4

6

2

5

0

3

5

Day Code:
Sunday

Monday

Tuesday

Wednesday

Thursday

Friday

Saturday

0

1

2

3

4

5

6

Steps to solve:
Other Formulas:
Odd Days:We are supposed to find the day of the week on a given date.
For this, we use the concept of 'odd days'.
In a given period, the number of days more than the complete weeks are called odd days.
Leap Year:(i). Every year divisible by 4 is a leap year, if it is not a century.
(ii). Every 4th century is a leap year and no other century is a leap year.
Note: A leap year has 366 days.
Examples:Each of the years 1948, 2004, 1676 etc. is a leap year.
Each of the years 400, 800, 1200, 1600, 2000 etc. is a leap year.
None of the years 2001, 2002, 2003, 2005, 1800, 2100 is a leap year.
Ordinary Year:The year which is not a leap year is called anordinary years. An ordinary year has 365 days.
Counting of Odd Days:1.1 ordinary year = 365 days = (52 weeks + 1 day.)
∴∴ 1 ordinary year has 1 odd day.
2.1 leap year = 366 days = (52 weeks + 2 days)
∴∴ 1 leap year has 2 odd days.
3.100 years = 76 ordinary years + 24 leap years
= (76 x 1 + 24 x 2) odd days = 124 odd days.
= (17 weeks + days) 5 odd days.
Number of odd days in 100 years = 5.
Number of odd days in 200 years = (5 x 2) 3 odd days.
Number of odd days in 300 years = (5 x 3) 1 odd day.
Number of odd days in 400 years = (5 x 4 + 1) 0 odd day.
Similarly, each one of 800 years, 1200 years, 1600 years, 2000 years etc. has 0 odd days.
For solved problems on above formulas please visit below sections: