What are the twenty-four solar terms song and the nine nine songs?

The twenty-four solar terms song:

Spring rains startle the spring and clear the valley days, summer is full of mango and summer is connected with summer heat.

Autumn dew in the fall, cold frost, winter snow snow winter small cold.

The two sections of the month do not change, but differ by one or two days at most.

The first half of the year is six twenty-one, the second half is eight twenty-three.

The nine-nine song:

One-nine-two-nine does not go out;

Three-nine-four-nine on the ice; five-nine and six-nine, along the river to see the willows;

Seven-nine river freezes open, eight-nine swallows return;

The nine-nine plus one-nine, plowing oxen all over the place.

Baidu Encyclopedia - Song of the 24 Seasons

Baidu Encyclopedia - Song of the Nine Days