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There are several calendars applicable today on earth. What it is respected as an International Standard calendar is the Gregorian one adopted in February 24, 1582.

For religious and social purposes there are countries that they still follow the Julian calendar, Islamic countries follow the relevant Islamic calendar [based in the phases of the moon], Hindu calendar in India, the Chinese calendar in China and the Jewish calendar.

The Gregorian calendar has a cycle of 19 years that the earth's movements around the sun are repeated. The 19 years cycle was observed by Meton a mathematician, astronomer, geometer and engineer in the 5th century BCE.

There is also the cycle of the Great Year [Megalos Eniautos - Μεγάλος Ενιαυτός] which is approximately 25.000 years.

In this cycle earth completes the passage of all zodiac signs [on average 2.080 years each]. Earth was in the zodiac sign of Pisches for the last 2.000 years and we are now entering the region of Aquarius, an on going process.

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Q: Why isn't your calendar divided into months with equal numbers of days?
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What is the viking calendar?

As farmers, the Vikings divided the year into summer and winter halves. Each half was further divided into a number of weeks. Months were of less importance for farming.For fishermen and navigators, though, the moon and the 'moons' (months) were important. Though the Viking calendar therefore might appear a little inconsistent, it perfectly served their needs.The calendar which had developed from seasonal and climatic factors, divided the year simply into equal halves; winter and summer.A man's age was counted not in years but in "winters", a custom which still applies to livestock. This would seem to indicate that the beginning of summer was regarded as a "new year", although there was no New year as such.The year was also divided into lunar months. The counting of days was probably relatively inaccurate, especially in the summer months when the nights are bright in northern regions and it can be difficult to see the moon. Thus summer and winter were also divided into weeks, and periods of time were more likely to be counted in weeks than months.Although the Roman system for months and days existed in Iceland from the introduction of Christianity in around 1000, farmers and seamen invariably used only the old almanac. Not until the late 18th century did laymen begin to use the Latin names of the months January to December.


What is 0.999 divided by 0.03?

33.3


10 examples of law of acceleration?

-- A car accelerates in the direction of the net force on it, at a rate equal to the magnitude of the net force divided by the mass of the car. -- A stone accelerates in the direction of the net force on it, at a rate equal to the magnitude of the net force divided by the mass of the stone. -- A Frisbee accelerates in the direction of the net force on it, at a rate equal to the magnitude of the net force divided by the mass of the Frisbee. -- A baseball accelerates in the direction of the net force on it, at a rate equal to the magnitude of the net force divided by the mass of the baseball. -- A dog accelerates in the direction of the net force on it, at a rate equal to the magnitude of the net force divided by the mass of the dog. -- A book accelerates in the direction of the net force on it, at a rate equal to the magnitude of the net force divided by the mass of the book. -- A canoe accelerates in the direction of the net force on it, at a rate equal to the magnitude of the net force divided by the mass of the canoe. -- An airplane accelerates in the direction of the net force on it, at a rate equal to the magnitude of the net force divided by the mass of the airplane. -- A planet accelerates in the direction of the net force on it, at a rate equal to the magnitude of the net force divided by the mass of the planet. -- A cow accelerates in the direction of the net force on it, at a rate equal to the magnitude of the net force divided by the mass of the cow.


How many months are there in 40 years?

There are 12 months in one year. Therefore, 40 years is equal to 40 x 12 = 480 months.


What does the Greek letter 'phi' mean?

It symbolizes the golden ratio. The Golden Ratio: The number approximately equal to 1.618033989... which is exactly equal to (1+√5)/2, If you divide a line into two parts so that the longer part divided by the smaller part is also equal tothe whole length divided by the longer part, then, you will have the Golden Ratio.