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History of Calendar is given on:
http://sushmajee.com/reldictionary/dictionary/page-C/calendar-history-1.htm
However a short description of modern calendar is gien below:
Modern Calendar
Today's calendar year begins in January conceivably because it's the first full month when the days start growing longer (minutes of daily sunlight increasing in the Northern Hemisphere, which includes most of the world's land and about 90% of the human population), after the Winter Solstice at the end of December. Additionally, the planet Saturn mutually ruling time and the sign of Capricorn might have something to do with the selection of January as the first month of the calendar year. The seven day week division is probably linked to ancient farmers planting by the moon's phases (seven day quarters). As to why the day officially starts at 12:00 a.m. and not sunrise, it's possibly due to the fact that after 12:00 a.m. the Sun departs from its daily nadir (in relation to the Earth) as it begins its ascent to the mid-heaven, which it reaches at Noon.
After the 1600s the Gregorian calendar was finally used throughout most of Europe and was adopted by what is now the east coast of America in the mid 1700's, before 1776, the recognized birth year of America. Greece and Russia avoided using it until the early 1900's. Japan formally implemented it in 1873, Korea in 1896, and China in 1912.
Note: Calendars in India: there are 21 different calendars in India used in different parts of India; read in detail:
http://sushmajee.com/reldictionary/dictionary/page-C/calendar-history-1.htm
However a short description of modern calendar is gien below:
Modern Calendar
Today's calendar year begins in January conceivably because it's the first full month when the days start growing longer (minutes of daily sunlight increasing in the Northern Hemisphere, which includes most of the world's land and about 90% of the human population), after the Winter Solstice at the end of December. Additionally, the planet Saturn mutually ruling time and the sign of Capricorn might have something to do with the selection of January as the first month of the calendar year. The seven day week division is probably linked to ancient farmers planting by the moon's phases (seven day quarters). As to why the day officially starts at 12:00 a.m. and not sunrise, it's possibly due to the fact that after 12:00 a.m. the Sun departs from its daily nadir (in relation to the Earth) as it begins its ascent to the mid-heaven, which it reaches at Noon.
After the 1600s the Gregorian calendar was finally used throughout most of Europe and was adopted by what is now the east coast of America in the mid 1700's, before 1776, the recognized birth year of America. Greece and Russia avoided using it until the early 1900's. Japan formally implemented it in 1873, Korea in 1896, and China in 1912.
Note: Calendars in India: there are 21 different calendars in India used in different parts of India; read in detail:
