On the fifteenth day of the first month, the night lights

Thousands of doors are unlocked, and all lights are on, and the Imperial Capital is moved in the middle of the first month.

311 wives danced in sleeves, and words were heard in the sky for a moment.

Translation:

On the Lantern Festival, thousands of families go out of their homes, and countless lanterns light up in the streets, as if the whole of Kyoto shook.

Countless ladies-in-waiting danced with sleeves to their hearts' content, and the music of singing and dancing in the world soared into the sky.

Note:

Thousands of doors: describe the magnificent buildings of the palace complex, with numerous houses.

My wife: A geisha who sang in the palace in the afternoon entered Yichun Courtyard and was called "my wife".

with: the same, still "have". This sentence describes the song singing high into the clouds, but also means that the music is sweet, just like Yue Xian's descent.