Isnt the 25th Dec the day of Mithras? The early Christians replace the 25th Dec with Jesus birthday..it was also about the Winter Solstice as a symbol of hope in the darkest day of Winter..I do not see it as issue,,Jesus wont mind it too,,,Dec 25 is selected and its now accepted,,so be it,,,for non believers its a holiday for them too,,I doubt they will complain..
There are about 90 days in winter season, why 25 Dec was selected and who selected it? Do you research before replying. I can give hint if you need help