Green willows sway, spring ends, and the phoenix bird comes to announce the arrival. It is the time when the growth starts in the leap fourth month, and on the first day of the month, joy is seen in front of the house.

A leap fourth month in summer, the second day sees a child born into the world. Red pomegranate flowers bloom under the sun, and happy sparrows call out in the branches.

Sunflowers bloom and the cuckoo cries, peonies blossom and the cuckoo cries again. On the third day of the leap fourth month, the embryo descends and the parents are delighted in the marital chamber.

Meadow before plum trees brings a harmonious scene, and yellow birds sing continuously on the branches. It is the time of the leap fourth month, and on the fourth day, the embryo is born in the room.

Warm winds are hot in the middle of summer, and cicadas call constantly. On the fifth day of the leap fourth month, the parents smile on the hall.

Pomegranate flowers burn red under the sun, and after summer and autumn come again. Born on the sixth day of the leap fourth month, the moon is not yet full, like a bow.

Warm winds are hot and the scenery is beautiful, but the plum rain is not good, dripping on the flower tips. Born on the seventh day of the leap fourth month, the dream foretells the descent of a phoenix feather.

Plum rains meet again, the flowers fall, and the temple still offers cherries. Born on the eighth day of the leap fourth month, the moon hangs high on the Great Wall, and the shadow gradually rises.

Pomegranate flowers get redder after the rain, and the autumn dream has passed, coming again. Born on the ninth day of the leap fourth month, the moon hangs at the willow branch, and the shadow becomes clear.

Meeting plum rains and passing warm winds, the branches have large apricots like golden bells. Born on the tenth day of the leap fourth month, the joy matches the couple, and their colors are red.

Purple camphor flowers bloom red under the sun, and the garden is full of peach and plum trees hanging golden bells. Born on the eleventh day of the leap fourth month, the osmanthus flowers fall, and the children are just formed.

Pomegranate flowers open red under the sun, and the willow branches high up echo the sound of cicadas. Born on the twelfth day of the leap fourth month, the pear blossoms look like silver bells.

In the shade of willows, swallows chirp, and summer is hot with warm winds. Born on the thirteenth day of the leap fourth month, the oriole sings in the morning.

The cuckoo calls to welcome birth, and the destiny is clearly defined. Born on the fourteenth day of the leap fourth month, the parents add smiles in the hall.

The curtain is not rolled, and the swallow calls, and the oriole's voice is very painful. The yellow bird sings on the branches, and it is the fifteenth day of the leap fourth month.

Determine your birthday, the moon is bright and the wind is clear. Born on the sixteenth day of the leap fourth month, the warm wind moves the cuckoo's sound.

Sunflowers bloom in midsummer, and the leap fourth month is the seventeenth day. Falling petals fly and people remain, and the parents' love is as high as heaven.

Warm winds move and it is the middle of summer, and the swallows speak without stopping, and the cuckoo returns. Born on the eighteenth day of the leap fourth month, the parents add smiles in the hall.

Born on the leap fourth month in summer, the green willow branches echo the sound of cicadas. Born on the nineteenth day, the parents add smiles in the hall.

Pomegranate flowers open red under the sun, and the yellow bird plays skillfully on the tree. The peach and plum trees bear fruit, and the leap fourth month is the twentieth day of birth.

Born during the early summer of the leap fourth month, the birth date is the twenty-first day. Sunflowers are like flowers, and the silkworms are on the branches of the yellow bird.

It is a beautiful season in early summer, and the fate is determined from birth. Born on the leap fourth month, the twenty-first day of the month is when he was born into the world.

In front of the courtyard, pomegranate flowers are fresh, and the leap fourth month is the middle of summer. Born on the twenty-third day, he is born in the evening and lives long like Mount Nanshan.

Pomegranate flowers open red under the sun, and the willows deep in the forest echo the sound of cicadas. It is a beautiful season of the leap fourth month, and the body appears on the twenty-fourth day.

Sunflowers bloom and the yellow bird is happy, and the oriole sings in the middle of summer. Born on the twenty-fourth day of the leap fourth month, the embryo is complete and born into the world.

Spring wind moves the green willow leaves, and the willow forest echoes the sound of cicadas. The birthday is the leap fourth month, and the person is born on the twenty-sixth day.

Plum blossoms bloom in the hall, and the festival meets again in the summer. The birthday is the leap fourth month, and the person is born into the world on the twenty-seventh day.

First creating death, then creating life, the leap fourth month is the yuan geng. Born on the twenty-eighth day, the embryo lands and the mother and child are safe.

Green wood scenery is in the summer, and the cuckoo calls loudly on the branches. Born on the twenty-ninth day of the leap fourth month, the late scenery ensures peace and longevity.

Warm wind passes and the willow is green, and the yellow apricot is ripe like golden bells. Born on the thirtieth day of the leap fourth month, one's life is secure and prosperous.

Among ancient laborers, the former solar terms (Lichun, Jingzhe, Qingming, Lixia, Mangzhong, Xiaoshu, Liqiu, Baizhu, Hanlu, Lidong, Daxue, Xiaohan) were called "solar terms"; while the latter solar terms (Yushui, Chunjufen, Guyu, Xiaoman, XiaZhi, Dasha, Chushu, Qiufen, Shuangjiang, Xiaoxue, Dongzhi, Dahan) were called "midterms."
There are an average of 365.2422 ÷ 12 = 30.4368 days between two midterms, which means 30 or 31 days. The Earth's orbit around the Sun is elliptical. In the perihelion (vernal equinox, autumnal equinox), the movement is faster, and the time between two solar terms can be as long as 31.45 days. However, the average length of a lunar month is only 29.5306 days. A small lunar month has 29 days, and a large lunar month has 30 days. This results in situations where some months (usually small months) start with the previous midterm already passed and end with the next midterm not yet arrived. For example, in 2001 (Xin Si Snake Year), the midpoint of Xiaoman was on May 21 (the 29th day of the fourth lunar month). The next lunar month began on May 23, which had already missed Xiaoman, but this lunar month ended on June 20, while the midpoint of XiaZhi was on June 21. Therefore, this lunar month did not have a "midterm," and since it came after the fourth lunar month, it was called a leap fourth month. According to this rule of inserting a leap month, there were leap months in July 2006, May 2009, April 2012, September 2014, June 2017, April 2020, and February 2023.