驴年马月 (驢年馬月) lǘ nián mǎ yuè

lǘ nián mǎ yuè set phrase year of the donkey, month of the horse; an unknown time
Domain: Literary Chinese 文言文 , Subdomain: , Concept:
Notes: (Guoyu '驢年馬月'; Han Dian '驴年马月')