How to divide the common year? How to calculate the common year and the run year

In the Gregorian (Gregorian calendar) year, a year with a leap day is called a leap year, which is 365 days in a normal year and 366 days in a leap year. Since the Earth's orbit around the Sun is 365 days, 5 hours, 48 minutes and 46 seconds, which is a return year, the Gregorian calendar defines a year as 365 days. The remaining time is about one day over four years, added to February, so that in a normal year there are 365 days per year, 28 days in February, 366 days in leap years, and 29 days in February.

Thus, there are 97 leap years in every 400 years, with leap years having an additional day at the end of February, and 366 days in leap years. How to calculate leap years: The number of years in the Common Era is divisible by four, that is, leap years; divisible by 100 and not divisible by 400 for common years; A leap year is divisible by 100 and also divisible by 400.

For example, 2000 is a leap year, but 1900 is not.

There are 365 days in a normal year, as February has 28 days. Leap years have 366 days, as February has 29 days with an extra day.

Any year that is divisible by 4 is a leap year!

Divisible by 4 years.

What can be divisible by 4 is Runnian, and what is not divisible is Pingnian.

How to calculate leap years: The number of years in the Common Era is divisible by four, that is, leap years; divisible by 100 and not divisible by 400 for common years; A leap year is divisible by 100 and also divisible by 400.

In general, year 4 is a leap year if it is an integer, otherwise it is a common year.

Look at the number of days in February.

1) This number of years can be divisible by 4 is the run, if it is a whole hundred years, such as 2200, it should be divided by 400

2) Look at how many days there are in February in the calendar of that year, and 29 days is a leap year.

In the Gregorian (Gregorian calendar) year, a year with a leap day is called a leap year, which is 365 days in a normal year and 366 days in a leap year. The Gregorian calendar defines a year as 365 days. The remaining time is about one day over four years, added to February, so that in a normal year there are 365 days per year, 28 days in February, 366 days in leap years, and 29 days in February.

Thus, there are 97 leap years in every 400 years, with leap years having an additional day at the end of February, and 366 days in leap years. How to calculate leap years: The number of years in the Common Era is divisible by four, that is, leap years; divisible by 100 and not divisible by 400 for common years; A leap year is divisible by 100 and also divisible by 400.

For example, 2000 is a leap year, but 1900 is not.

If the number of years in the year is divisible by both 4 and 400, then the year is a leap year.

Usually divide the number of years by 4 and if divided by , it is a leap year:

But when it's 2000 and 1900, divide it by 400

First of all, divide by four, to see if you can get rid of 100, if you can't, it's a leap year, if you can, you can see if you can get rid of 400, if you can't, it's a leap year, if you can't, it's not.

A leap year is divided by 4 without a remainder, otherwise it is a common year.

4 years and one run, the normal year is equal to 365 days + 5 hours, 48 minutes and 46 seconds, which is 365 days according to the solar calendar. After four years, I have accumulated 4 5 hours, 48 minutes and 46 seconds, which is about 24 hours, that is, one day. In other words, if you put this day in February, you have 29 days in February in leap years.

In a normal year, February has 28 days.

Not only does the Earth revolve around the sun, but it also keeps circling itself. The earth revolves around itself as we see a day and a night, which is 24 hours, and its revolve around the sun is 365 days, 5 hours and 48 minutes in a year, which is a normal year.

1. Years (not integers) divisible by 4 are leap years.

For example, 2005, 2001, 2007, 2009, and 2013 are all normal years, and 2004, 2008, 2012, and 2016 are all leap years.

2. The years (integers) that can be rounded out by 400 are leap years.

For example, the years 1900, 1800, 1700, etc., are not divisible by 400, so they are all common years. The years 1200, 1600, and 2000 can all be rounded out by 400, so they are all leap years.

1. For non-whole 100 years:

Divide the year by 4, if it is divisible, it is a leap year, if there is a remainder, it is a common year;

2. For a whole hundred years:

Divide the year by 400, which is a leap year if it is divisible, and a common year if there is a remainder.

For example: 2016 4=504, so 2016 is a leap year, 2017 4=504....1, so 2017 is a common year;

2000 400 = 5, so 2000 is a leap year, 1900 400 = 4....300, so 1900 is a common year.

Causes. The usual explanation is that there are many days, hours, and minutes in a year, and the whole number 365 is still superfluous, and after the accumulation reaches 24 hours in a day, the year in which an extra day is added is a leap year. This explanation just tells everyone how to calculate, and it is something that is set artificially.

The most fundamental reason is that the Earth's orbit around the Sun is 365 days, 5 hours, 48 minutes and 46 seconds (conjunction), which is a tropical year. The common year of the Gregorian calendar is only 365 days, which is about one day shorter than the return year, and the remaining time is about one day every four years, so the fourth year adds one day at the end of February, so that the length of the calendar year of that year is 366 days, and this year is a leap year.

There are 97 leap years in the current Gregorian calendar every 400 years. According to a leap year every four years, the average number of days per year is to be counted out, so that after 400 years, about 3 days will be calculated. Thus three leap years are reduced every 400 years.

Therefore, the Gregorian calendar stipulates that when the year is an integer hundred, it must be a multiple of 400 to be a leap year; A century year that is not a multiple of 400, and even a multiple of 4 is not a leap year.

This is what is commonly said: every four years, no leap in a hundred years, and another leap in four hundred years. For example, 2000 is a leap year and 2100 is a common year.

First of all, you have to correct the "run year" to "leap year"! Since October 4, 1582, the next day is directly set as October 15, the week cycle remains unchanged, every 4 years except for the century year is an integer multiple of 400 for a leap year, not an integer multiple of 400 is not a leap year, every 4 years in the century year can be divisible for a leap year, a century is arranged according to 24 leap years, the 100th is not a leap year, that is, every 4 years of leap, every century is an integer multiple of 400 is also a leap year, other years are ordinary years, and the February date of a common year is 28 days, The date of February in a leap year is 29 days, and according to the original arrangement, 3200 years is not a leap year, and the calendar will need to be revised in the future!

In general, year 4 is a leap year if it is an integer, otherwise it is a common year.

Look at the number of days in February.

1) This number of years can be divisible by 4 is the run, if it is a whole hundred years, such as 2200, it should be divided by 400

It is stipulated that the Gregorian calendar year is an integer hundred, and it must be a multiple of 400 to be a leap year, not a multiple of 400, although it is a multiple of 4, it is also a common year, which is commonly said: a leap in four years, no leap in a hundred years, and a leap in four hundred years.

Leap years 2008, 1916, 1972, 1432, 2032, 1992.

Divide by 4, divisible is a leap year, not a common year Like 1900, there are 2 zeros at the end of the year.

In addition to 4 ordinary years, except for 4 ordinary years, I will not still play with the computer.

The formula for calculating common and leap years: divide the year by 4, the one with no remainder is the leap year, and the remainder is the ordinary year.

A common year is a year in which there are no leap days in the solar calendar or no leap months in the lunar calendar. The number of years in Common Era can be divisible by 4 as leap years, but the number of years in a whole hundred (0 in the single digit and the tenth place) must be divisible by 400 to be a leap year (e.g. 1900 is not a leap year), and the others are ordinary years. For example:

1997 was a normal year, and 2002 was a normal year; 1996 was a leap year and 2000 was a leap year. February in a common year has 28 days, while February in a leap year has 29 days.

A leapyear is established to make up for the difference between the number of days of the year and the actual orbital period of the earth caused by the artificial calendar. There are 29 days in February in leap years, and there are 366 days in the year, which are divided into ordinary leap years and century leap years, ordinary leap years refer to the Gregorian calendar year is a multiple of 4, and not a multiple of 100, and the century leap year must be a multiple of 400.

Summary. The difference between a leap year and a peaceful year is that a leap year has 366 days and a common year has only 365 days.

The difference between a leap year and a peaceful year is that a leap year has 366 days and a common year has only 365 days.

The division of leap years and peaceful hill years is as follows:1Ordinary leap year:

A Gregorian calendar year is a leap year if it is a multiple of 4 and not a multiple of 100. For example, 2008 is a leap year because 2008 4=502, the remainder is 0, and 2008 is not a multiple of 100. 2.

Century leap year: The Gregorian calendar year is a whole hundred, and it must be a multiple of 400 to be a leap year. For example, 2000 is a leap year, because 2000 4=500, the remainder is 0, and 2000 is a multiple of 400, so 2000 is a leap year; And 1900 is not a leap year, because 1900 4 = 475, the remainder is 0, but 1900 is not a multiple of 400, so 1900 is a common year.

A common year is a year in which there are no leap days in the solar calendar or no leap months in the lunar calendar. A leap year is a year in Common D.D. that is divisible by 4, but a year of a whole hundred (0 for single and ten) must be divisible by 400 (e.g. 1900 is not a leap year), and the others are common years.

For example, 1997 is a normal year and 2002 is a normal year; Mori Shihiro 1996 is a leap year, and 2000 is a leap year. February in a common year has 28 days, while February in a leap year has 29 days.

The Gregorian calendar has 366 days in a leap year, with 29 days in February; The solar calendar has 365 days in a normal year and 28 days in February.

A leap year was established to compensate for the difference between the number of days of the year and the actual orbital cycle of the earth caused by the man-made calendar. The year in which the time difference is made up is a leap year.

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Leap years and peace years are concepts related to the "leap day" in the Gregorian calendar.

A leap year is a year in which an additional date (February 29) is added to the year. According to the Gregorian calendar, leap years occur in leap years: a year in the Gregorian calendar that is divisible by 4 and not divisible by 100 is a leap year; A year that is divisible by 400 is also a leap year.

For example, 2000 is a leap year, and 2100 is not a leap year.

A common year is a year with no leap days (i.e. only 28 days in February). According to the Gregorian calendar, non-leap years are ordinary years.

The concept of leap years and peace years was created to adjust the problem of a non-early match between the calendar and the Earth's orbital cycle. The orbital period of the sun is shorter than the basic 366-day solar calendar used by humans, so the introduction of the leap year mechanism allows the calendar to align with the seasons as closely as possible.