A few years ago, my daughter turned me onto the idea that there's a Major Arcana Tarot card that informs the overarching energy for the year on a global scale. She now has a business offering astrology and Tarot card readings! (click here to learn more)
One way to think about this is that the card sets a tone for the year on a world-wide level.
To determine which card is being activated is simple. Add the numbers of the year together. So, for this year it would be: 2+0+2+5=9