I opened a fresh fridge pack of Sprite.
The use by date is 12/27/10.
The pull tabs (the disposable part) are colored
bright forest green. Is this a new thing?

Yea, rolled out about the same time the new Mello Yello's did.

Coke is donating money to Habitat for Humanity. For every green tab sent in, they'll donate 10¢. I'm surprised it didn't have that info on the packaging - it's on our Sprite and Sprite Zero 12 packs.

My Coke Rewards | My Coke Rewards

I looked at the fridge pack package inside and out and
there wasn't anything about Habitat for Humanity. Strange?