Does Earth Week start on Sunday, April 18, or Monday, April 19? Retailers can't agree -- and some have even decided to kick off their Earth Week deals today. So enjoy an extra long Earth Week! --

>> Need a new pair of organic undies? Green underwear company PACT’s launched its newest “Green Belt Movement” print today — one that’s sure to please treehuggers. Between April 16-25, PACT will donate ALL of the proceeds from the collection -- designed by African architect David Adjaye -- toward planting 10,000 trees in Africa. That’s 20 trees planted per panty!

necklace and bag

>> Get your fair trade wine at Target? Stop by this Sunday, April 18, because Target will be giving out 1.5 million free reusable bags to its customers. The green bag (below) is made with 100% post-consumer recycled PET (plastic bottles) — and is a gift that keeps giving, since Target gives a 5-cent discount for bringing your own reusable bag.

>> Thinking ahead for Mother’s Day? Brilliant Earth’s offering a free ring deal. Buy your mom (or yourself) an ethically-sourced, eco-friendly ring from Brilliant Earth between April 18-24, and get a free Green on the Inside charm necklace (above).

>> Have a bunch of old, PVC-tainted yoga mats laying around? Collect 5 old yoga mats and send them in to Recycle Your Mat — and get a free Recycled Wool Blanket from Manduka! Simply send the pack of 5 to Recycle Your Matwith a note mentioning the wool blanket deal and your address, and Manduka will send you your freebie. The old mats will get recycled into new products, according to Manduka.

Bottom images courtesy of Brilliant Earth and Target

Earth Week deals and steals
Earth Week's about to begin -- and brings with it a whole bunch of green deals, like tree-planting panties, free recycled reusables, and more.