Who's idea was it to have クリスマス in winter? WHEN WE ALL HAVE COLDS?

'Who's idea was it to have クリスマス in winter?'
Umm...Jesus?! He was born on 25th Dec.
I was also with a cold two days ago, still recovering, yesterday I couldn't sleep at all but , so far, so good!

ジーザス wasn't born in December.

It is in the winter because クリスマス is a very old tradition. It was known as Yule.
They used to celebrate クリスマス to bring back the light in the dark short and cold day's.

It has nothing to do with ジーザス at all. It is a very old Germanic/Celtic tradition.
It has to be in the winter because then the day's are the shortest.

Haha I just recovered from the mother of all colds... at least it felt like it.

あなた could try moving to the Southern Hemisphere, where it is summer during December!