"猴年马月(hóunián mǎyuè)" means there is no specific deadline for an on-going thing or specific date for occurrence of the thing. It also indicates that something is unlikely accomplished. Someone believes that "猴年马月(hóunián mǎyuè)" is derived from "何年嘛月(hénián màyuè)", an expression in Tianjin dialect.
例句 Sentences
1、 这个项目已经拖了好久了,再这样下去,猴年马月才能完成。 Zhège xiàngmù yǐjīng tuō le hěnjiǔ le ,zài zhèyàng xiàqù, hóunián mǎyuè cái néng wán chéng. This project has been delayed for a long time. If things go on like this, God knows when we can finish it.
2、这都是猴年马月的事情了,你居然还记着? Zhè dōu shì hóunián mǎyuè de shìqing le, nǐ jūrán hái jìzhe? It happened a long time ago, but you still remember it!