Does everyone read the yearbook online? Why is the month sign on it so different from what my mother said? ...

Because the zodiac is determined by the month according to the solar terms of the month:

-The first month after beginning of spring, Yin Jian-a tiger;

Jian Mao after the February shock-a rabbit;

After the Qingming Festival in March, Chen Jian was a dragon;

After the long summer in April is completed, it is a snake;

After planting awns in May, it will be noon-a horse;

It was built after the slight summer heat in June-it belongs to sheep;

After the early autumn of July, Shen Jian was a monkey.

In August after the Millennium, it was built-a chicken;

After the cold dew in September-a dog;

After October, beginning of winter built Hai-a pig;

After the heavy snow in November, Jane became a mouse;

After the slight cold in December, the building is ugly.

The seventh day of the ninth lunar month is still a chicken, and the seventh day of November is a dog. Because the seventh day of the ninth lunar month is after the white dew and before the cold dew, it is a chicken after the white dew. The eleventh is the dog, because it was built after the cold dew-it is a dog;