Yes, but that is a coincidence. Russians celebrate Christmas on December 25th like everyone else (except some norther Europeans, we celebrate on the eve), it's just that their view of when it is December 25th differs.

Yes, it's a coincidence, that's why I find it curious :)

Christmas in Russia is celebrated on 7 January

My point was that no, the holidays are celebrated on the same dates throughout the Christian world, but depending on which calendar you use those dates fall on different days. Today for example it's August 10th in many Orthodox churches, while most others would say it's the 23rd.

That holiday is Epiphany, which is a separate holiday (and I believe actually falls on the 6th of January on the Gregorian calendar).

It's amusing that Twelfth Night is so little known, despite the play, the "12 days of Christmas", and so on.

I suspect if you asked most people when the 12 days of Christmas are, they'd say they were December 14-25 (or maybe even 13-24). After all, that's when you buy the presents!