There are several bands named Mayday. Mayday is also well known as a recording moniker of Derrick May. One is a metallic hardcore band from Virginia Beach, Virginia in the 1990s. They released two 7"s, a 10" and a split with Integrity. While they were never particularly popular, they were fairly influential as one of the first hardcore bands to incorporate very overt metal elements. The other is an indie rock band from Nebraska. Read more about Mayday on Last.fm.