Explanation: Old refers to the lunar calendar on February 12 that North Korea spent. Source: Qin Qing Yun taste "so pure compiled on" Volume "Tao Zhu book" 'Feb. 12 for the birthday flowers. No rain, flowers are cooked. '" Examples: February 12 each year, according to legend is ~. (Qing Wu Jian "feelings" Diba Hui)