In the Northern Hemisphere, what is the shortest day of the year, also the longest night called?

In the southern hemisphere the winter solstice is also the shortest day, sunlight. It is just six months earlier/later than the northern one

weird how a question about day length can trigger so many religious comments.

Kris, trees and eggs do seem to be plagiarized, or at least chosen to blend in to avoid persecution. But rituals from 1000s of years ago were to remember specific events: e.g. the resurrection of Jesus the Messiah (God/man).