When was Kim Jong-un conceived?
He was conceived around

He was born on Jan 8, 1983.
It's really only a rough guess based on Kim Jong-un's birth date and so this calculator should only be used for curiosity. An average gestation period of 38 weeks is used to calculate the conception date.
We used http://en.wikipedia.org/wiki/Kim_Jong-un as a reference for Kim Jong-un's birth date and then calculated the conception date based on this.