Last year on Lantern Festival, the lights in the flower market were like daylight. What was the festival?

Sheng Chazi One (Song Dynasty·Zhu Shuzhen) (One is written by Ouyang Xiu Ci)

On the night of Yuan Dynasty last year, the lights in the flower market were as bright as day. On the top of the willow tree in the moonlight, people meet at dusk.

On Yuan Ye this year, the moon and the lights are still the same. I don't see the person from last year, and my spring shirt sleeves are wet with tears.

Note: ① Yuan Ye: The fifteenth night of the first lunar month, that is, the Lantern Festival, also known as the Shangyuan Festival.

Season refers to the climate and phenology of a certain solar term. Since the specific time of writing is unknown, but it should be the spring season, a few are provided for reference only:

Beginning of Spring February 2-5 Jiao Festival

Rain Festival will be on February 18-20

Jingzhe will be on March 5-7

Spring Equinox will be on March 20-22