The Ukrainian military and Russian-backed separatists in eastern Ukraine accused each other on January 1 of violating a shaky holiday truce between the warring sides.
Russia says it's suing Ukraine for defaulting on a $3 billion Eurobond debt owed to Moscow.
Ukraine's free-trade agreement with the European Union has come into force, coinciding with the start of Moscow's food embargo against Kyiv.
Ukrainians are debating a petition to celebrate Christmas on December 25, like Western Europe, rather than continuing to mark the holiday on January 7 according to Orthodox Christian tradition.
Ukrainian police are blaming saboteurs yet again for blowing up an electricity pylon that shut down electricity for at least one quarter of the residents of Crimea.