The christmas spirit?

What is christmas spirit? After all these satanic things they are trending in usa i start to wonder what connection christmas have to Jesus Christ. So I did some research and came up with that Jesus is not born 25 december but in april! Hmm, strange! So why this lie in december? You heard of St,Nicolas? Saint Nic? Santa? Satan? Oops! Who? Santa/satan. So what is the christmas spirit? Who is it for? Who said it was going to be like this? I won’t name names, but here’s a hint: he made the curriculum for all schools in the 1920s.