lol, I guess it would be harder in general or non Christians or non Euro and or north americans. I love the left side of page 1, Ranga makes a cute Rudolf lol
The religious part can be described pretty easy and as to why december 25 was chosen for Jesus's birthday. Then the current trend is to spend fuck loads of money on gifts which is dumb cause appreciate and the special part goes down. Most important part is getting together with friends and family to enjoy eachother's company, have a great meal, have fun, give something special to the people you want. Then talk about Santa and more magical parts and weirder traditions. Christmas is complicated lol