I like this blog post, which advocates a Nation Bike to Shop Day.
Why We Need a National Bike to Shop Day | One woman. Many bicycles.
IMHO, while I think commuting is a vital part of cycling transportation, using a bicycle to shop is what separates the poseurs from the hard-core.Still, shopping by bike isn’t seen as mainstream. Few bikes come equipped with racks or baskets and bike shops and bike manufacturers rarely actively promote that kind of riding. I could elaborate on this, but I already have before, and if you’ve ever shopped for the perfect bike bag or basket you probably know what I mean. And there’s no national Bike to Shop Day program like there is for Bike to Work Day.