Christmas origin may be a solstice celebrations. And it may also be a Jesus Christ birthday celebration. But - what should be the true Christmas spirit? Jesus Christ response to some questioning (Matthew, Chapter 22) may help:
"Master, which is the greatest commandment in the law? Jesus said to him: You shall love the Lord your God with your whole heart, and with your whole soul, and with your whole mind. This is the greatest and the first commandment. And the second is: You shall love your neighbour as you love yourself."
Presents and celebrations may be a nice manifestation of love to the other people. Wise man or woman will also observe the other commandment - the one which Jesus Christ himself called "the greatest commandment".