Перевидите on december 22 we have the shortest day and the longest night of the year.on this day winter begins. after this day days become longer and nights become shorter . on march 21,when the day is as long as the night,spring begins.on june 22 we have got the longest day and shortest night of the year ,and summer begins. after this day nights become longer and days become shorter .on september 23 the day is as long as the night . on this day autumn begins