During a two-day special event, shoppers at Macy's can earn a 20 percent discount on most items in the store by making a $5 donation to benefit the National Park Foundation.

The discount will be applied on April 26 and 27 during Macy's special charity shopping event titled "One Good Turn." Donations will be accepted beginning Sunday at most stores or online at www.nationalparks.org.

In addition, Macy's is offering free saplings to the first 100 customers at its stores on Earth Day this Tuesday. The sapling is part of an effort by Macy's to raise awareness for national parks and protection of the environment.