What is the division of two different dates?

You can also say that it is the trajectory of the direct point of the sun, which is on the Tropic of Cancer on June 22, and the direct point of the sun on June 24 is 15 degrees 26 minutes.

The artificial date line is based on the 180° meridian, its position is always the same, and there is a natural date line 0 time meridian, which is not fixed.

One is fixed, i.e., the international date line, and the other is unfixed, i.e., 24 o'clock.

Calculation of dates. There are two date boundaries: the natural date boundary

Local time is 0:00 or 24:00 on the meridian line.

Artificial date line: Generally, the ** meridian 1800 of the 12 districts of the east and west is used, that is, the international date line. The world is generally divided into two dates by two meridians, and the meridians of the divided date are the international date line and the meridian at 0 local time, these two meridians can coincide, and when the two coincide, there is only one date in the world.

Calculation of the longitude range of two dates: the key is to find the longitude of the 0 point longitude when the place is located. In general:

Today's longitude ranges are: longitude 0 point longitude ---180; Yesterday's longitude range: 180---0 points of longitude.

The year is 365 (366) days, and the summer and winter solstices are found based on the Earth's orbit around the Sun. Then you can work out each day.

Enter or copy-paste this formula in C1.

if(a1=b1,"Same","different")

Pull-down padding.

Same as 1 day = if (day (1st date cell) = day (2nd date cell),"Same","different")

Depending on what you do, if you want to perform some operations to determine that the same day is true, I'm afraid you will need to use macros.

It is based on an international longitude meeting.

An international longitude conference held in Washington, D.C., in 1884, stipulated that the world be divided into 24 time zones. They are the middle time zone (zero time zone), East 1-12 zones, and West 1-12 zones. Each time zone spans 15 degrees of longitude and the time is exactly 1 hour.

Finally, the 12th East and West Districts each span longitude degrees, bounded by 180 degrees east and west longitude. The time on the **meridian of each time zone is the time uniformly adopted in this time zone, which is called zone time.

In fact, many countries and regions in the world do not strictly calculate time by time zone. In order to adopt a uniform time nationwide, the time in a certain time zone is generally used as the time of national uniformity. For example, China regards the time in the East 8 District, where the capital Beijing is located, as the unified time of the whole country, which is called Beijing time.

For example, countries such as the United Kingdom, France, the Netherlands, and Belgium, although they are located in the middle time zone, use the time in Zone 1 East in order to match the time of most countries in Europe.

At 180° east-west longitude, you can see that the International Date Line is not a straight line, but has been deliberately curved to facilitate life here.

Earliest country: the Republic of Kiribati in the Pacific Islands.

Latest country: Samoa in the South Pacific.

Longitude, 15 degrees of longitude is one hour. It should be an island nation in the Pacific Ocean.

Take 0 degrees of longitude as the ** longitude, and from west longitude to east longitude as the middle time zone. To the east, it is divided into East 1 District to East 12 District; The west is divided into West 1 and West 12.

The world is divided into 24 time zones, each of which is 15 degrees.

The east and west 12 zones are a time zone, and their **longitude is 180 degrees. The time is the same, the date is one day apart.

Each time zone takes the local time of the ** meridian of the region as the time used by the whole region, that is, the district time.

The earlier countries are the ones located on the 180th degree longitude – New Zealand, Fiji, are all countries that saw the sunrise earlier.

By the way, for you to despise the upstairs and downstairs advertising for the cause you like to engage in, fight! Through a variety of different assessment methods, first, find your own career ideals, have ideals, there will be a future, as the saying goes: "If you don't have a will, there is nothing to do in the world, and you can see your father sitting in a small store playing cards at the door of your home."

During the Qin and Han dynasties, the 24 solar terms have been fully established and divided. In 104 B.C., the "Taichu Calendar" formulated by Deng Ping in the Han Dynasty officially set the 24 solar terms in the calendar, clarifying the astronomical position of the 24 solar terms.

According to the available information, the 24 solar terms may have occurred at the end of the Warring States period. Although the names of all the 24 solar terms only appeared in the Western Han Dynasty's Huainanzi Tianwenxun, the Lü's Spring and Autumn Period, which was written at the end of the Warring States period, recorded most of the names of the 24 solar terms.

The ancients determined the beginning and end of the four seasons according to the laws of heaven and earth, and divided the 24 solar terms. The annual trajectory of the sun is divided into 24 equal parts, each equal part is a "solar term", collectively referred to as the "24 solar terms". Twenty-four solar terms, which represent the earth's orbit, twenty-four different positions.

Since it takes 365 days for the earth to circle the sun, there is a solar term every 15 days, and each solar term represents different changes in climate, phenology, and time. The spring rain shocks the spring and the valley sky, and the summer is full of mangs and the summer and summer are connected. Autumn dew, autumn frost, winter snow and snow and winter small and big cold.

This well-known "solar term song" by Chinese implies the order of the 24 solar terms.

Han dynasty. Bai twenty-four verses.

The first du of the name of qi is found in "Huainanzi Tianwenxun", and the concepts of yin and yang, four hours, eight positions, twelve degrees, and twenty-four solar terms are also mentioned in the "On the Essence of the Six Inner Families" in the "Zhi Shi Dao Ji Taishi Gong Zi Preface".

During the reign of Emperor Wu of the Han Dynasty, the solar terms were compiled into the "Taichu Calendar", and the total number of days in a year was divided into 24 segments, each of which was about 15 days; There are two sections per month, the beginning of the month is called "festival", and the middle of the month is called "qi". There is a distinction between a "festival" and a "qi" every month, the "festival" is the beginning of the month, and the last day of the "qi" is the end of the month. It is also stipulated that the month without mid-air shall be the leap month of the previous month.

The "Pingqi method" uses shadow measurement to determine the winter solstice day, and then the next winter solstice day is divided into 24 segments (about 15 days each). It is used to reflect the four seasons, temperature and phenology of the Yellow River Basin. The "flat air method" is a time averaging method, with an interval of about 15 days between each solar term, and the calculation does not take into account the uneven speed of the sun's movement on the ecliptic, which is inconsistent with the actual celestial phenomena.

The solar terms divided by the "Pingqi Method" start with the winter solstice and end with heavy snowfall.

The 24 solar terms originated in the Yellow River Valley. As far back as the Spring and Autumn Period, there were four versions of solar terms, such as mid-spring, mid-summer, mid-autumn and mid-winter. Not right later.

By the time of the Qin and Han dynasties, the 24 solar terms had been fully established. In 104 B.C., the "Taichu Calendar" formulated by Deng Ping officially set the 24 solar terms in the calendar, clarifying the astronomical position of the 24 solar terms.

There are two main methods for the ancients to calculate and determine the 24 solar terms: one is called the equal division method, which divides the year into 24 equal parts, that is, the day 24 = day, that is, the interval between every two solar terms, the average is 15 days; The other is called "fixed qi method", because the sun moves unevenly on the ecliptic every day, the winter solstice moves faster before and after, and the summer solstice moves slower before and after, so that the equal division method is not reasonable, the ancients created the specific date of the solar term with the fixed qi, so that the spring equinox and autumn equinox are arranged on the day of the day and night equinox, and the position of the sun on the ecliptic in a year is divided into 24 sections, which are distributed in the lunar calendar in December, and the first month of each month is called the "solar term". Twelve solar terms such as the beginning of winter, heavy snow, small cold, etc., are called "middle air" in the middle of the month, and there are twelve solar terms such as rain, spring equinox, valley rain, small man, summer solstice, great heat, summer heat, autumn equinox, frost fall, light snow, winter solstice, and great cold.

Hope it helps, hehe.

According to the existing .

For BAI information, see du, xxiv.

The solar terms can be produced at the end of the Warring States period. Although the names of all the 14 solar terms of the 2 specializations only appeared in the Huainanzi Tianwenxun of the Western Han Dynasty, the "Lü's Spring and Autumn Period", which was written at the end of the Warring States Period, recorded most of the names of the 24 solar terms. Some people think that the 24 solar terms are subordinate to the lunar calendar, but in fact, it is delineated according to the solar calendar.

That is, according to the position of the Sun on the ecliptic, the year is divided into 24 equal segments. That is, the ecliptic is divided into 24 equal parts, each of which occupies 15° of the ecliptic longitude. Since the time it takes for the sun to pass through each equal part is almost equal, the Gregorian calendar date for the twenty-four solar terms is about the same every year:

The first half of the year is around the 6th and 21st, and the second half of the year is around the 8th and 23rd. And there are two mantras: the first half of the year.

Sixth, twenty-one, the second half of the year.

Eight, twenty-three.

In astronomy there has long been Ophiuchus, which is not a new discovery, and it is not used in astrology, because the scope of this constellation is so wide that it cannot be legally defined as one-twelfth of a circle. And it is impossible for a true astrologer to say the personality of Ophiuchus, because there is no such sign in astrology, and it is not a professional astrologer who says that there is such a sign.

They don't look at the sun in the sky, they look at the sundial (gui). The main principle is that there is a pattern in the change of shadows throughout the day. In fact, in a sundial, a stick is the main thing .........

There's a calendar, too.

Mainly by observation.