Blue Day is a summary of the Slowdive, Morningrise, and Holding Our Breath EPs, minus "Catch the Breeze," "Golden Hair," and "Avalyn II." It was initially released in Japan, France, and a couple of other countries, and it was also included with the first 1000 CD copies of Souvlaki sold in the U.S. and U.K. It's an excellent document of their pre-Just for a Day material.