No. Nations nowadays different, of course, but you can't hide from your past, and all that separation was thanks to political decisions, when church leaders was tied to country's rulers. So Christian Christmas has no unique date, it has three dates at minimum - part of the countries (that is closer to the Europe, as example Greece or Bulgaria) has Revised Julian calendar, so they celebrate it on December 25th, small part of the Christians (Armenian church) celebrate it on January 6th, and part of the countries (Russia, Georgia, Ukraine, Belarus, Moldova - surprise, surprise, ex-USSR, and Macedonia, Montenegro, Serbia - isn't it was some socialist union too?), where was applied Julian calendar celebrates it on January 7th. There is some movement from January to December (that me personally approve), but it is very slow.