According to Hearth, Patio and Barbecue Assn:

• The most popular holidays for barbecuing are, in order, July 4th (76 percent), Memorial Day (62 percent), and Labor Day (62 percent).

According to HPBA's 2013 survey data (the most recent year this data was collected),

• The most popular foods for cooking on the grill are, in order: burgers (85 percent), steak (80 percent), hot dogs (79 percent) and chicken (73 percent).
  The side dishes most commonly prepared on the grill are, in order, corn (41 percent), potatoes (41 percent), and other vegetables (32 percent).
  The most popular flavors of barbecue sauce are hickory, followed by mesquite, honey, and then spicy-hot.