Check Out Some Of This Year's Best Ad Agency Holiday Cards

Over the years, the tradition of ad agencies sending creative holiday cards to employees, associates, and loved ones adapted significantly for modern technology.

Now "holiday card" is a casual term that can refer to an online video, an app, a game, a GIF, or anything else creatives can think up.

This year, we highlighted 10 of our favorites.

There's an elaborate website meant for David Bowie, an egg nog variation of a beer pong game benefiting a dog shelter, and a site that lets users write a holiday message in the stars.