某年某月某日某地某个某人
[mŏu nián mŏu yuè mŏu rì mŏu dì mŏu gè mŏu rén]
An abstract way of saying there was once a time and place and a certain someone, which adds to mystery about oneself or a particular event or moment that mattered. Translates as 'A certain year, month, day, place, and someone'.