In fact, one year is not fit to 365 days. but 365 days 5 hours 48 minutes 45.1814 seconds. If this is ignored, then every four years will be a shortage of nearly 1 day (exactly 23 hours and 15 minutes 0.7256 seconds)
Additional day in the annual calendar was first introduced by the ancient Egyptian culture. In 238 BCE, Ptolemy II ordered additional day every four years, to avoid the shifting seasons. But Egyptian farmers resist the change because they have been used to refer to the peasantry the season calendar system.
February 29, officially born in the era of Julius Caesar. The emperor ordered astronomnya, Sosigenes for more accurate dispensing systems for the first century. He then compose new dating totaling 365 days with an extra day every four years.
Although not directly related to the Leap, Leap seconds needed to align the rotation of the Earth with human clock and calendar. Because the rotation of the Earth every day to slow down as much as 2 milidetiki. Therefore Leap seconds are added on the last day of June last year. Since 1972 the Earth's rotation slows down as much as 26 seconds.
Gregorian calendar used today is a modification of the system drawn up in the era of the Roman Empire, Augustus. When he came to power, the emperor added two days in the month, which is in August, so it becomes 31 days. Julius Caesar made a similar case in July. As a result, only the remaining 28 days for February
Currently about 4.1 million humans on Earth were born on February 29. In principle, babies born on Leap year only celebrate a birthday every four years. The babies were rare because the opportunities are born in Leap years only one out of 1,461 cases.
Source : Here
Fact about Leap Year
Facts about the Leap Year in the modern era:
1. In the modern era, Leap Year brings 'bad luck' for office workers. The reason, many offices have issued a monthly salary based on a count of 28 days, meaning on February 29, many workers who will work for free.
2. Those born on February 29 called 'leapling' or 'leaper'. Opportunities someone born on Feb. 29 is 1: 1461. At least, there are 5 million leapling worldwide.
3. Family holder leapling births in the world are family Keogh of Britain and Ireland. For three generations, the family always had offspring that were born on February 29. Starting from his grandfather, Peter Anthony Keogh, then his son, Peter Eric and grandchildren, Bethany Wealth.
4. Another story with in Denmark. If men refuse to cover women on February 29, then he must give her 12 pairs of gloves. In Finland, men should give women the fabric to make clothes.
5. In Greece, the couple married in may reject Leap Year because they believe it will bring bad luck. Trust is also adhered to Italian citizens. No Italian proverb that said, "Anno bisesto, anno funesto" which means Leap Year, the year of bad luck.
Source : Here
