KERALA PSC / PHYSICAL GEOGRAPHY / YEARS, MONTHS & CALENDARS / NOTES / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE

 

KERALA PSC / PHYSICAL GEOGRAPHY / YEARS, MONTHS & CALENDARS / NOTES / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE

KERALA PSC / PHYSICAL GEOGRAPHY / YEARS, MONTHS & CALENDARS / NOTES / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE

·      The days and years ate based on solar (sun) time

·      One day equals to the length of time it takes for the earth to make one complete revolution in its own axis

·      One year is the approximate time taken by the earth to make one complete revolution around the sun

·      The Sumerians, Babylonians and ancient Egyptians had calendars based on the lunar month. The original Roman calendar apparently covers only agricultural months

·      A calendar instituted in 1582 by Pope Gregory XIII has now been used in most of the world. Its distinguishing feature is that, in it a century year is a leap year

·      Leap year is an year which is exactly divisible by four. But the last year of a century will be a leap year only if it is exactly divisible by 400. Thus 1700, 1800, 1900 are not leap years but 1600, 2000, 2400 etc are leap years. This correction was made by Pope Gregory XIII in AD 1582

·      A year with 366 days is called a leap year. In a leap year, February will have 29 days

·      The concept of leap year was introduced in the Roman calendar by Julius Caesar in 46 BC, on the advice of his astronomer Sosigenes

·      Britain introduced the Gregorian calendar in 1752

KERALA PSC / PHYSICAL GEOGRAPHY / YEARS, MONTHS & CALENDARS / NOTES / OBJECTIVE QUESTIONS / STUDY MATERIALS / GENERAL KNOWLEDGE