How to solve discrepancies between Julian and Gregorian calendars.

Viktor Biryukov, Dr. habil. engineering, specialist in technics ecology,
engineering technology and bioacoustics,
the president of the Russian Scientists Association of Latvia
Riga, Latvia

A detailed analysis of several calendar system advantages and disadvantages is given in this writing adding some outline of historical and modern astronomic investigations. The author offers and mathematically proves his own version of a calendar, which could clarify modern Gregorian caledar mistakes and would make a calendar year closer to the astronomical one.