Walmart in-store content is routinely developed with the current season in mind. Major holidays like Halloween, Thanksgiving and Christmas each have a full month of programming with food and decorating ideas. Special events like back-to-school also will lead content development. Months without significant holidays or events turn to suggestions for the season, such as backyard barbequing in the summer, moisturizers in the winter or seasonal fruits and vegetables.
For April 2008, Walmart decided to celebrate Earth Day (April 22) with a campaign of programming that would span the whole month. Green themes have been a hot topic for many businesses in recent years, so the timing couldn't have been better.