Mystic Stamp Company (Official) on Instagram: "✏️ Did you know the first crossword puzzle was published by Arthur Wynne on this day (December 21) in 1913? It appeared in the New York World's Sunday fun section and changed the world of puzzles forever. Now, crosswords are a daily ritual for millions who enjoy the challenge. Plus, is there any better feeling than finally completing an especially difficult puzzle?! We thought it might be fun to include a crossword puzzle of our own with today's pos