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Transcript
CALENDAR SYSTEM
Presented By
S.SATHISH
CONTENT
INTRODUCTION
TYPES OF CALENDAR
SOLAR CALENDARS
JULIAN CALENDAR
LUNAR CALENDARS
LUNISOLAR CALENDARS
CONCLUSION
INTRODUCTION
The calendar is a system of arranging the year into days, weeks and months.
The purpose of the calendar is to reckon past or future time, to show how many days until a
certain event takes place:
-Harvest
-Religious festival
-How long since something important happened
No one knows who invented the first calendar.
No one knows when the first calendar was invented.
TYPES OF CALENDARS
SOLAR CALENDARS
LUNAR CALENDARS
LUNISOLAR CALENDARS
SOLAR CALENDARS
Solar Calendar is finalized on the basis of
movement of the Earth around the Sun.
 One revolution of the earth around the sun
equals one year, or 365.242199 days.
It has 365 days in a year but every fourth year
is a leap year i.e. an extra day is added to the
month of February.
Julian
Calendar,
Gregorian
calendar,
Malayalam calendar and Thai calendar are
some of the examples of solar calendar.
JULIAN CALENDAR
It is introduced by Julius Caesar, was first used in 45 BC.
The calendar had 365 days in a year comprising of 12 months.
Every fourth year was celebrated as a leap year with a day added to February.
Julius Caesar’s calendar started with the month of March and ended with the month of
February.
JULIAN CALENDAR HISTORY
Julius Cesar was a famous Roman Emperor.
He wanted a new calendar for his empire.
He picked the Egyptian calendar and changed
it a little bit.
Julius Caesar expanded the Roman empire
until it covered parts of Africa, Asia and
Europe.
As the empire grew, the calendar went with
it. That is why European countries use this
calendar.
NAME OF THE MONTHS
Julius Caesar named the months of the year as follow
March- the Roman god Mars
April- the old Roman calendar month of Aprilis
May- the Roman goddess Maia
June- the Roman goddess Juno
July- named after Julius Caesar
August- named for the Roman emperor Augustus
September- from the Latin septem which means seven
October- from the Latin octo or eight
November- from the Latin nove or nine
December- from the Latin decem or ten
January- the Roman god Janus
February- the Roman purification festival Februa
LUNAR CALENDARS
It is based on Movement of the moon around
the earth.
One revolution of the moon around the earth
equals one month.
 It has 12 lunation or months comprising of 29
to 30 days as against 30 to 31 days in a Solar
Calendar.
In some lunar calendars like Chinese calendar, a
month starts on the day of the arrival of the new
moon while in others, the first day of the month
is determined by the day the crescent of the
moon is sighted.
Islamic calendar, Hindu calendar and Chinese
calendar are some of the examples of lunar
calendars.
The moon’s movement around the earth
ISLAMIC CALENDAR
It is generally used in all Muslim-dominated
countries, always consists of 12 lunation or
months in a year of 354 or 355 days.
Mainly used for religious purposes, this
calendar helps Muslims all over the world
determine Islamic holy days like Id, Moharram
etc.
LUNISOLAR CALENDARS
The Luni-solar calendar is based on the
movement of the moon around the earth and
the earth around the sun.
A lunisolar calendar is a lunar calendar that
compensates by adding an extra month as
needed to realign the months with the
seasons.
An example is the Hebrew calendar which
uses a 19-year cycle.
HEBREW CALENDAR
The Hebrew calendar is used for religious
purposes by Jews all over the world, and it is
one of the official calendars of Israel
A Hebrew calendar day does not begin at
midnight, but at either sunset or when three
medium-sized stars should be visible,
depending on the religious circumstance.
CONCLUSION
Inspire of that fact that we all know the system of that calendar that we use now, we should
realize that it is the great creation of people and also our ancestors spend thousands of years to
create calendar.