Lantern Festival (a.k.a. Chinese Valentine's Day) falls on the 15th Day of Chinese New Year.
Here are two poems with English rendition to describle the occaion.
《青玉案·元夕》 （宋）辛棄疾 (1140-1207)
東風夜放花千樹 更吹落 星如雨
寶馬雕車香滿路 鳳蕭聲動 壺光轉 一夜魚龍舞
蛾兒雪柳黃金縷 笑語盈盈暗香去
眾裏尋他千百度 驀然回首 那人卻在 火闌珊處