The event was "Avatar Day, " sponsored by 20th Century Fox.

FORBES: Magazine Article

Why not change the avatar to a picture of a squid for one day, why not tweet a link to an old Muppet Show clip.

FORBES: Welcome to Twitter, Goldman

"I am pleased to have the opportunity to share the environmental messages from AVATAR through the efforts during the 40th Anniversary of Earth Day and with Earth Day Network, " said James Cameron.

ENGADGET: Avatar disc opens up online-only extras until ultimate edition arrives in November, 3D next year

The first Fox title under the agreement will be Avatar, which hit stores on Thursday in time for Earth Day.

FORBES: Redbox Settles With Universal And Fox

Following that he wrote, produced and directed Terminator 2: Judgment Day (1991), True Lies (1994), Titanic (1997), and Avatar (2009).

FORBES: Move up http://i.forbesimg.com t Move down

The ultimate high definition experience for home viewing audiences, AVATAR will be available on Blu-ray and DVD everywhere in the United States and Canada on Earth Day, April 22.

ENGADGET: Avatar disc opens up online-only extras until ultimate edition arrives in November, 3D next year