Holiday Celebrated in Russia on May 9: __ Day
Puzzle 4 of Paper Crafts Hard Pack
Question is: Holiday Celebrated in Russia on May 9: __ Day
and the answer is: VICTORY
Word Meaning:
VICTORY — (uncountable) The condition or state of having won a battle or competition, or having succeeded in an effort; (countable) an instance of this.
Definitions from Wiktionary.