For the rite of Lughnassadh, my grove celebrates this in the Irish cultural style, and a key aspect of the Irish celebration of Lughnassadh was a major festival gathering across all of Ireland. This festival involved, among other things, a truce among all the various warriors to replace their usual efforts to kill each other with efforts to impress each other, the nobility, and of course the audience. So while there are mentions of the mythology of the god Lugh in this song, the focus is much more on the human side of celebrating this season.
Musically, this is a fairly straightforward jig, with 8-bar phrases and a clear E-major key. The harmonies I chose to use in the recording are fairly fast-moving and complex, but simple E-A-B harmonies would work just fine (or D-G-A for any guitarists that want to capo up 2 frets). One slightly unusual aspect is that the 2nd and 3rd phrases are identical musical lines, while more commonly the musical lines will be paired up with the 1st and 2nd matching and the 3rd and 4th also matching.
All works are copyright by yours truly, but may be distributed under Creative Commons Attribution Non-Commercial Share-Alike 4.0. That means, in short, you can use them yourself and your grove, and play the song to your heart's content both in private and in public, but must give credit where credit is due, and if you're planning on selling something involving this song we need to talk about that first.