double-ninthday的起源和由来（double ninth在几月几日）

重阳节（农历九月九日） Double-ninth Day（重九节直译）

由来：

The origin of Chongyang Festival can be traced back to ancient times. In ancient times,

there were activities of harvest sacrifice and Mars sacrifice in autumn and autumn.

重阳节的源头，可追溯到上古时代。古时季秋有丰收祭天、祭祀大火星活动。