There are two issues of Air n-Aithesc per year. The first issue comes out on Imbolc and the second on Lughnasadh. The reason there are only two issues is that it takes time to edit and lay out the magazine, and since we don't want to rush out contributors and the editors are all voluntary and have an outside life, it was best to only have two issues out each year.
Don't forget that the door to submissions to the latest issue of Air n-Aithesc is not open. For guidelines on submissions please see our Submissions Page. The door closes on December 31st.