There must have been a leap year in four consecutive years

There is not necessarily a leap year in four consecutive years. Gregorian calendar years are multiples of 4 and are generally leap years. (e.g. 2004 is a leap year).

Any year in which there is a leap day (29 days in February) in the solar calendar; Leap more (more than the year is intercalated. The difference in time between the lunar calendar and the return year).

Note that there is no direct correlation between leap years (nouns in the Gregorian calendar) and leap months (nouns in the lunar calendar), which are only divided into leap years and peaceful years, with a common year having 365 days and a leap year having 366 days (one more day in February); There may also be leap months in a normal year (e.g. 2017 is a common year, and the lunar calendar has a leap month and a leap month in June).

Not necessarily. Generally, if the number of Gregorian years is a multiple of 4, it is a leap year, otherwise it is a common year;

That is, for four consecutive years, there is a leap year and three common years.

However, if the Gregorian calendar year is a whole number of hundreds of years, it must be a multiple of 400 to be a leap year, and a multiple of 400 is a common year.

For example, 1896 is a leap year, and after four years, 1900 is a multiple of 4, but not a multiple of 400, so 1900 is not a leap year, but a common year.

Yes. Because leap years occur once every four years.

It is not right that there must be a leap year in four consecutive years. Gregorian calendar years are multiples of 4 and are generally leap years. Note that there is no direct correlation between leap years and leap months, and in the Gregorian calendar, there are only leap years and peaceful years, with 365 days in a common year and 366 days in a leap year (one more day in February); There may also be leap months in a common year.

The Earth's orbit around the Sun is 365 days, 5 hours, 48 minutes and 46 seconds, which is a return 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. Therefore, every 400 years, there is a reduction of three leap years with brothers.

Calculation of leap years:

In 2017, after research, the calculation of leap years should be as follows:

Formula 1: 4 years to talk about stupidity 1 leap, 400 years 97 leap, 3200 years (97 * 8-1) leap, 86400 years (27 * (97 * 8-1) + 1) leap (20926 leap).

Formula 2: 1 leap in 4 years, 31 leap in 128 years, 86400 years (675*31+1) leap (20926 leap).

There must be a leap year every four consecutive years. This statement is false. If the last two digits are 0, it must be divisible by 400 to be a leap year, otherwise it is not.

How to calculate leap years:

A normal year is a leap year that is divisible by 4 and not divisible by 100. (For example, 2004 is a leap year, and 1900 is not a leap year).

Century years divisible by 400 are leap years. (e.g. 2000 is a leap year, 1900 is not a leap year).

For a year with a large number, it would be a leap year if it was divisible by 3200 and divisible by 172800.

Brief introduction. Where there is a year in the solar calendar that has a leap day (the 29th day of February), the leap more (the year is more than the leap day. The difference in time between the lunar calendar and the return year).

Note that there is no direct correlation between leap year (noun in the Gregorian calendar) and leap year (noun in the lunar calendar), the Gregorian calendar is only divided into leap years and peaceful years, with 365 days in a common year and 366 days in a leap year (one more day in February); There may also be a leap month in a normal year (e.g. 2017 is a common year, and the lunar calendar has a leap month and a leap month).

No, because I'm looking at what other people say.

It is false to say that there must be 1 leap year every 4 yearsA normal year is a leap year that is divisible by 4 and not divisible by 100, but in 2099 there is not a single leap year in these 4 years, so there is not necessarily a leap year every 4 years.

Leap years are meant to compensate for the time difference between the number of days of the year and the actual orbital cycle of the earth due to the man-made calendar.

and established. The year in which the time difference is made up is a leap year. Leap years are included in the Gregorian calendar (Gregorian calendar.

Or the summer calendar. There are years with leap days or leap months.

A brief introduction to the rest of the leap year.

In the old Chinese lunar calendar, a year with a leap month was called a leap year. A normal year is 12 months, 354 or 355 days, and a leap year is 13 months, 383 or 384 days. The lunar calendar serves as a lunisolar calendar.

The number of days per month is determined by the monthly loss, and the time of the year is based on 12 months; In order to coincide with the Earth's orbital cycle around the sun, i.e., the return year, one month is added every 2 to 4 years, and the additional month is a leap month, so the leap year of the lunar calendar is 13 months.

It is false to say that there must be 1 leap year every 4 years, and the average year is divisible by four.

It is a leap year, but a whole hundred years need to be divisible by four hundred to be a leap year, for example 1696 is divisible by four, but 1700 is not divisible by 400, so 1696 is a leap year, 1700 is not, and 1704 is again.

Leap years

Leap years are meant to compensate for the time difference between the number of days of the year and the actual orbital cycle of the earth due to the man-made calendar.

In the case of establishment, the year in which the time difference is made up is a leap year.

The usual explanation is to say how many days, hours, and minutes there are in a year, and round them up.

After 365 days.

There is also the excess, after the accumulation reaches one day, an additional day is added, and the year in which the extra day is added is a leap year.

According to the leap year algorithm, 4 AD is a leap year, and the cycle is 4 years, if there is 0 AD, it is a leap year. Since there is no 0 AD, then 1 BC is a leap year.

Wrong. A general year is divisible by four to be a leap year, but a hundred years need to be divisible by four hundred to be a leap year, e.g. 1696 is divisible by four, but 1700 is not divisible by 400. Therefore, 1696 was a leap year for Kirigami, 1700 was not, and 1704 was again, and there were no leap years for 8 consecutive years.

A leap year is a noun in the Gregorian calendar. Leap years are divided into ordinary leap years and century leap years. Leap years are created to compensate for the time 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.

There are 366 days in a leap year (31, 29, 31, 30, 31, 30, 30, 31, 31, 30, 31, 30, 30, 30, 30, 31 and 31 from January to December). Any year in which there is a leap day (29 days in February) in the solar calendar; Leap more (more than the year is intercalated. The difference in time between the lunar calendar and the return year).

Note that there is no direct correlation between leap year (noun in the Gregorian calendar) and leap month (noun in the lunar calendar), which is only divided into leap years and peaceful years, with 365 days in a common year and 366 days in a leap year (one more day in February); There may also be leap months in a normal year (e.g. 2017 is a common year, and the lunar calendar has a leap month and a leap month in June).