Why in year 366 days an a necessary to in 4 years one times 366 days c

1.	Why in year 366 days an a necessary to in 4 years one times 366 days come
Answer» There are\xa0366 days\xa0in a leap year. A year usually has\xa0365 days. The extra day is needed to keep the calendar "in synch" with the Earth\'s orbit around the Sun. The Earth takes about\xa0365\xa0and a quarter days to orbit the Sun once. The extra 6hours is not included in each year. Thus leap year comes once in every four years including an extra day(24 hours) that is 29th February including the extra 6hours from each 4 revolution time periods.

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