It closely, it’s a multiple of 4 and if we know 2000 is a leap year, we can calculate it. But, if we look at the following year 2020, we would see it meets all of the conditions for the concept of being a leap year mathematically. When we look at this year, 2019 is not a leap year because it’s not a multiple of 4 or 100. For example, although the years 4000, 1600 can be fully divided into 400, the years will no longer be accepted as leap More sensitive, the years that are divided into 4000 without any residues are no longer considered as leap years. The reason why only fully divisible by 400 is now considered a year is to eliminate the error caused by an astronomical year being approximately 365,242 days instead of 365.25. For example, 1200, 1600, 2000 are leap years, but 1700,ġ8 are not leap years. The Julian Calendar and developed Iranian calendars also have leap years with similar rules. The year 2000 is a good example of leap year,īut the year 1900 (because it is the multiple of 100 but not 400’s) is no longer a leap year. In addition, only the non-multiples of 100 and 4 are leap years. The years that are multiple of 400 as a leap year. In simple terms, we can say that leap years are years that are four and multiples of four. Years can now be calculated in detail and effectively by governments and individuals empowered at various levels of government. So much so that dozens of people born on February 29 can celebrate their birthdays for one time in every four years. This situation causes us not to live on the 29th of FebruaryĮach year. The leap year application was implemented for the first time in the calendar type known as the Julian Calendar in the year 46 AD. Normally, a year takes 365 days for the Gregorian Calendar. In addition, if you see the day of February 29 on the calendar, it means you are living in a leap year basicly. The reason off adding leap years in every 4 years at the end of February. According to the calculation, it collects the 6 hours for 4 years and it means 1-day. But, the modern Gregorian Calendar has only 365 days. If we observe the Earth’s revolution around the sun, it will take about 365 days and 6 hours. The last leap year was 2016, and the next leap year is 2020! Why Add Leap Years ? In this way, our time and seasons are balanced. Sun passes through the same meridian for the second time. The main point of the realization of this event is that the sun does not coincide with a certain day when the In February 4, which is 28 days for 3 years, it becomes 29 days. In this way, 366 days, that is, the year now occurs. With the accumulation of time periods of 6 hours, one more day The calculation of turning sun’s around the world is known as astronomical year and it takes 365 days and 6 hours. It was first applied in the Julian calendar in 46 BC. The reason for this is that February has 29 day in everyįour years. That is, a year includes 366 days instead of 365 days. Opposite to the concept of “common year”, the leap year is a four-year period according to the Gregorian calendar.
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