他说星期八娶我她说星期八嫁他
[tā shuō xīng qī bā qŭ wŏ tā shuō xīng qī bā jià tā]
Translated as 'He said he would marry me on the eighth day of the week; she said the same.' The humorous use of an imaginary 'eighth day' (there only being seven) signifies a fanciful or impossible promise.