Why did other women put flowers on the treetops the day Sister Lin buried them? Why is it also called "the day when flowers bloom"?

Jia Baoyu and his daughters held activities in the Grand View Garden. April 26th of that year, Cross Seed Festival. According to the book, they take this day as a flower festival to bid farewell to the flower god, that is, all the flowers are in bloom and they all want to leave. On this day, the children of the Grand View Garden and the Flower God held such a farewell party. It was at this time that Daiyu buried flowers. "Dai Yu Buries Flowers" has become the most typical picture that summarizes the protagonist's character. The appearance of the scene of "Daiyu burying flowers" was paved and set off by the bright and cheerful atmosphere on the day of flower burial.