Calendars are one of the important aspects of government entrance exams. The point "schedule" falls under the classification of consistent thinking as it includes a ton of sensible conversation and examination. One can definitely expect 2 to 4 problems in various government and bank exam question papers.
What is the Calendar?
A calendar is a chart or series of pages that show the days, weeks, and months of a particular year or provide specific seasonal information.
Below is a list of items in the Calendar section:
1. The basic structure of the calendar, and the concept of an odd day.
2. Decoded days of the week.
3. Leap year evaluation.
4. An evaluation of odd days in a century.
5. Type 1: Problems: Finding another given day.
6. Type 2 : Problems: Finding a day where another day is not given.
7. Type 3 : Problems: Matching one month calendars.
8. To explore various SBI exams, check the linked article.
Basic Construction of a Schedule
1. Common Year: 365 days is called a common year. Eg: 1879, 2009, 2019, etc.
2. Leap Year: A year with 366 days is called by as leap year. Eg: 2012, 2016 2020 etc.
3. Dividing 365 by 7 gives a quotient of 52 and a remainder of 1, indicating that a normal year has 52 weeks and one extra day. This extra day is referred to as an, 'odd day' in the calendar elements.
4. A leap year has 366 days, 366 divided by 7 gives quotient 52 and remainder 2. This means that a leap year has 52 weeks plus 2 extra days. These two extra days are also referred to as, the 'odd days'.
A normal year has one odd day, while a leap year has two odd days.
To know more about SBI Clerk Syllabus, check the linked article.
Concept of the odd day
 number of odd days in every months
January has 31 days regardless of whether it is a common year or a leap year. Number 31 divided by 7 gives a remainder of 3 so January has 3 odd days. In normalization, any month with 31 days has 3 odd days and any month with 30 days has 2 odd days.
Exception is made only in case of February. In a normal year the month of February has 28 days, 28 divided by 7 leaves a remainder of zero. Therefore, the number of odd days in February in a normal year has 0 odd days and in a leap year it has 1 odd day as February has 29 days.
The table below depicts the number of odd days in different months of the calendar year:
MONTHS

NUMBER OF ODD DAYS 
January 
3 
February

0/1 
MARCH

3 
APRIL

2 
MAY

3 
JUNE

2 
JULY

3 
August

3 
September

2 
October

3 
November

2 
December

3 
Table: List of number of odd days every months
The days of the week are coded by, as follows:
Day CODE 
Day

0

Sunday 
1

Monday 
2

Tuesday 
3

Wednesday 
4

Thursday 
5

Friday 
6

Saturday 
Table: The corresponding codes of the day of week
This table helps in decoding the answers obtained at the end of the problem solving process in the calendar topics wise.
Eg: If the value obtained in the last step of calculation is 10, then the number 10 is divided by 7 (as we have 7 days in a week) and the remaining 3 lists are decoded to select the correct options from the given 3. Here the remaining 3 indicate that the correct answer is Wednesday.
Example 1:
Today is Monday. After 61 days, it will be:
A. Tuesday B. Wednesday
C. Thursday D. Saturday
Explain:
 Each day of the week is repeated after 7 (seven) days. So after 63 days it will be on Monday. After 61 days it will be on Saturday.
👉 click here Solve the complex calendar questions.
FAQ:
Q1: How to solve questions based on calendar?
 Conclusion
1. We use the Gregorian calendar.
2. In solving a calendar problem, first, check whether the year is a leap year.
3. A leap year is divisible by 4; It can be easily identified.
4. A year has 2 weeks and 7 days in a week.
5. A normal year has one odd day and a leap year has two odd days.
Q2; What is the calendar trick?
 Tricks: There are 5 odd days in 100 years. 200 years, 5 x 2 =then 10 – 7 (one week) = 3 odd days,. 300 years 5 x 3 = then 15 – 14 (2 weeks) = 1 odd day. in 400 years, {5 x 4 + 1 (leap century)} – 21} (3 weeks) = 0 , odd days.
Q3: What is the formula of calendar?
 Count the number of days in each year, month and remaining days to calculate the total period between two dates. Use the formula: day = (reference day + number of days) % 7, where the reference day is the known day and the period to which the number of days is added.
Q4: క్యాలెండర్ ట్రిక్ అంటే ఏమిటి?
 ఉపాయాలు: 100 సంవత్సరాలలో 5 బేసి రోజులు ఉంటాయి. 200 సంవత్సరాలు 5 x 2 = 10 – 7 (ఒక వారం) = 3 బేసి రోజులు. 300 సంవత్సరాలు 5 x 3 = 15 – 14 ((2),రెండు వారాలు) = 1 బేసి రోజు. 400 సంవత్సరాలు {5 x 4 + 1 (లీప్ సెంచరీ)} – 21} (మూడు వారాలు) = 0 బేసి రోజులు.
Q5: What is the logic of calendar?
 It is based on a 19 yrs, metonic cycle, a 28 yrs 'solar cycle' and a 15 yrs indexical cycle. A period called, solar cycle, the days of a sevenday week repeat on the same dates.
Q6: How to find day by date trick?
 Take the last two digits ,of the year Add to that onefourth of those two digits (dispose of any remaining portion). Add to that the day of the month and the Month Key number for that month: Read Straightaway.... Partition the aggregate by 7. The rest of the day, of the week!.