Marcal celebrates Earth Month! This post may contain affiliate links. Please see the full disclosure policy here. Posted on April 13, 2010 Written by Mary 1 Comment Head over HERE and become a fan of Marcal on Facebook! This year in particular is extra exciting for Marcal as it marks the 40th Anniversary of Earth Day and the 60thAnniversary of Marcal…a combined 100 Years of Green! Marcal has created a “Marcal-endar” that I thought may be interesting for you! It has a month full of recycling facts & tips.