九月初九，又称重九节,踏秋节,登高节,菊花节,茱萸节,老人节，它是中国传统的节日。“九”在数字中是最大数，有长久长寿的含意，寄托着人们对老人健康长寿的祝福。

The traditional Double Ninth festival is on the ninth day of the ninth lunar month. According to the Yi Jing, the book of changes it says the number 9 is masculine and positive, so that’s where the festival originated from.