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Because they are useful for predicting the future.

Primitive people in the tropics have no real need for calendars; the weather doesn't change all that much from day to day. In the temperate zones, it's important to know when to plant, and when to harvest, and when to expect recurrent events.

One of the earliest calendars we know of was used to keep track of the seasons along the Nile River in Egypt; if you knew approximately when the Nile floods would occur each year (and they are fairly predictable!) then you knew more or less when to move to higher ground and when it might be safe to return.

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Q: Why arethe positions of earth and the sun used to develop calendars and clocks?
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Related questions

Why did man develop clocks and calendars?

To keep track of time.


Why the positions of earth and the sun were used to develop calendars and clocks?

becuz their from sunrise to sun down is considered a day and 24 hours on the clock is one day and one day contruibutes to the calender.


Why were the positions of the sun and Earth used to develop clocks and calendars?

becuz their from sunrise to sun down is considered a day and 24 hours on the clock is one day and one day contruibutes to the calender.


Is there a clock available that automatically sets for daylight savings?

Yes the one on your computer does that along with many LCD clocks with calendars.


How will you relate real numbers in your daily life?

u can see the numbers in the clocks, calendars etc. it is very helpful to us.


Do time and date on computers change automatically?

Yes. Computer calendars and clocks regulate themselves, even recognizing daylight savings time.


What are Daily life applications of real numbers?

There are many examples of daily life applications of real numbers. Some of these examples include clocks and calendars.


How does math influence our daily lives?

You need to know math in order to make purchases in your everyday life. Also math is important when using calendars and clocks.


What is a leap minute?

A Leap Minute is a minute that is added or removed according to what's needed to keep our clocks and calendars in synch with the movement of our planet and the sun. The movement of the Earth around the Sun, and around its own axis, doesn't match up exactly to our clocks and calendars. To prevent the error from growing year after year, Leap days, leap hours, leap minutes, even leap seconds, are regularly added to keep everything in synch.


How do Buddhist measure time?

The worldwide standard measures of time - seconds, minutes, hours, days, weeks, months, years, centuries- are used by Buddhists. They measure these by watches, sundials, clocks, and calendars.


What do you use to measure and tell time?

Obelisk, Sundial, Merkhet, water clock, escapement, quartz clocks, atomic clocks, wrist watch, the sun, and a microwave are just a few.


What do you call someone who is obsessed with time?

people who are obsessed with time are called really annoying and anal! lolBut seriously, the term is called timeophile-or chronophile for the obsession of devices that record time (watches clocks, calendars etc)