Green Halloween’s National Costume Swap Day Is October 13, 2012.

Four Loko Halloween Costume.Green Halloween’s National Costume Swap Day is one of the best reuse/reduce/recycle events of the year. All you have to do is visit their website and by state, find the closest participating store. Anytime between now and October 13, you can drop in and donate your previously loved Halloween costumes. Each store is offering some type of incentive (goodie bag, discount coupons etc.) for donating your old costumes and you’ll receive a ticket to the costume swap on Saturday, October 13. [National Costume Swap Day via Inhabitots]