Special events honoring the composer will be held all over Russia throughout the year, and this is one of those events.
From the Kremlin Palace (auto-translated from Russian):
You can see more lovely photos HERE.
According to what I can understand, the Kremlin Ballet will be taking The Snow Maiden and Swan Lake to China at some point during the year (2015) as well. I couldn't find more specific details, other than the destination is specifically Tianjin.
(Snegurochka): Kremlin Ballet production of Tchaikovsky's ballet based on Alexander Ostrovsky's tale of love. Kremlin Palace. Moscow Kremlin, the Troitsky Gate entrance. Metro Alexandrovsky Sad. Ticket office 1 Ulitsa Vozdvizhenka. Metro Borovitskaya. 495-628-5232, kremlinpalace.org. At 7 p.m.