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Calendars: Important Terms and Concepts (in Hindi)
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(In Hindi) Here we discuss Basics of Calendars, Ordinary year, Leap year, Odd days, Reference charts, Calendar Question types etc.

Bhavuk Pujara is teaching live on Unacademy Plus

Bhavuk Pujara
MDI Gurgaon ‘16-‘18 Rank 3rd | CAT 98.3 | Aptitude trainer for 4+ years

U
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  1. FEBRUARY 2016 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 CALENDARS Concept


  2. CALENDAR years Ordinary year - An ordinary year has 365 days Leap vear - A leap year has 366 days ' Difference between an ordinary year & a leap year is that a leap year has an extra day, as 29th Feb.


  3. CALENDAR years Leap year occurs every 4 years, to keep the calendar in alignment with the earth's revolution around the sun Earth takes 365 1/4th day or 6 hours in the calendar there is a leap year days to complete 1 revolution, thus to compensate . A year is NOT a leap year if it's not divisible by 4 or 400 Example: Years 1600, 2400 are divisible by 400, thus Leap years & Years 1700, 2100, 2300 are NOT divisible by 400, thus not Leap years


  4. Odd days Odd days - In a given time period, the no. of days that are more than the weekly cycle are called Odd days Example: In 12 days, we have 1 week & 5 days There are 5 Odd days In 23 days, we have 3 weeks & 2 days > There are 2 Odd days In 70 days, we have 10 weeks & 0 days There are 0 Odd days


  5. Odd days Example: In an Ordinary year, we have 52 weeks & 1 day There are 1 Odd day in 1 Ordinary year In a Leap year, we have 52 weeks & 2 days There are 2 Odd days in 1 Leap year Therefore, an Ordinary year has 1 Odd day & a Leap year has 2 Odd days


  6. Reference Chart January 1st 0001 A. D, was a Monday (Reference Chart) Reference Chart Number of Odd days 0 Day of the week Sunday Monday Tuesday Wednesday Thursday Friday Saturday 2 3 4 **Sunday is taken as the Reference point


  7. CALENDAR Problem types Type 1. Find the day of the week for a given date when some other date & day is specified Reference gi ven Type 2. Find the day of the week for a given date when NO other date & day is specified No reference given