How to calculate the Spring Equinox? Are the Beginning of Spring and the Spring Equinox the same?

The Spring Equinox is the midpoint of the 90 days of spring. It is one of the 24 solar terms. In ancient my country, people used the beginning of spring, summer, autumn and winter to indicate the beginning of the four seasons. So how do you calculate the Spring Equinox? Is the Spring Equinox the beginning of spring? Are the beginning of spring and the Spring Equinox the same? I believe many friends want to know and learn about this. Today, Encyclopedia Knowledge Network will share it with you.

Contents of this article

1. How to calculate the spring equinox

2. Is the Spring Equinox the beginning of spring?

3. Are the Beginning of Spring and the Spring Equinox the same?

How to calculate the spring equinox

The Spring Equinox is one of the solar terms that reflects the change of the four seasons. In ancient my country, the beginning of the four seasons was usually indicated by the beginning of spring, summer, autumn and winter. The Spring Equinox, Summer Solstice, Autumnal Equinox and Winter Solstice are in the middle of each season. On the day of the Spring Equinox, the sun shines directly on the equator, and the day and night are equal everywhere on the earth. Therefore, the Spring Equinox and Autumnal Equinox were also called "the division of day and night" in ancient times. There is a folk proverb that "the Spring Equinox and Autumnal Equinox, the day and night are equal." The Spring Equinox, also known as "the middle of the day", "the division of day and night" and "the month of mid-spring" in ancient times, falls around March 21 every year (from the 20th to the 22nd), and the lunar calendar date is not fixed. Calculation of the Spring Equinox Date [Y*DC]-L

Formula explanation: multiply the last two digits of the year by 0.2422, add 20.646, take the integer and subtract the number of leap years. The C value of the 21st century spring equinox = 20.646.

For example: The date of the vernal equinox in 2092 = [92×.0.2422 20.646]-[92/4]=42-23=19, March 19 is the vernal equinox.

Exception: For the year 2084, add 1 day to the result.

Is the spring equinox the beginning of spring?

The Spring Equinox means the middle of spring. The 24 solar terms reflect the changes of the four seasons. In ancient my country, the beginning of the four seasons was indicated by the beginning of spring, summer, autumn and winter. The Spring Equinox, Summer Solstice, Autumn Equinox and Winter Solstice are in the middle of each season.

The Spring Equinox is the midpoint of the 90 days of spring. It is one of the 24 solar terms and falls on March 20 of the Gregorian calendar every year when the sun is at 0° (the Spring Equinox). On this day, the sun shines directly on the Earth's equator, and the seasons in the northern and southern hemispheres are opposite. It is the Spring Equinox in the northern hemisphere and the Autumn Equinox in the southern hemisphere. After the Spring Equinox, polar day begins near the North Pole and gradually expands; polar day ends near the South Pole and polar night begins and gradually expands.

Are the Beginning of Spring and the Spring Equinox the same?

The Beginning of Spring and the Spring Equinox are different.

The Beginning of Spring and the Spring Equinox are both spring solar terms. As the beginning of the year's meteorology, they are at the top of the 24 solar terms. They guide people's work and life. For industries that depend on the weather for their livelihood, they are of practical significance and will also affect people's eating habits and clothing.