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Abstract

This scientific research is conducted to construct an equation relating time and date variables using the data obtained from periodic movements of some stars. The periodic movements of the stars have been examined carefully with a software program named Strarry Night Pro that gives the accurate locations of the stars in picture. Using the pictures of stars of a certain time and date, I have found the systematic variation in the location of stars. I have transformed the variaton into equation form. This equation helps us to determine the time if the date is given and vice versa. This systematic variation is caused of the difference between the real and accepted rotation period of the Earth. In other words it's accepted that the earth spins around its axis once in 24 hours but, in fact the real period is 23 hours 56 minutes. This time difference causes a deviation in the location of stars. Measuring the deviations for many times helped us to find the relationship between time and date.