New Year is on 1st of January in most countries, in China (and maybe a few other Asian countries) they have New Year later.
Christmas is celebrated in most countries with a christian influence on 24th - 26 th of December, just the orthodox christians celebrate it a few weeks later. That applies to probably most countries with kyrillic / greek letters (Greece, Russia, Ukraine, Makedonia, I don't know about Bulgaria). Not sure about the east baltic sea states and some others in proximity to Russia. Though some already mix with Islam beliefs or Bhuddism.