Beltane is Anglicized spelling for the Irish/Celtic holiday usually celebrated on May 1. It falls roughly halfway between the vernal equinox and the summer solstice. (May 1 in the Northern Hemisphere anyway.)
Here is Omnia with their song “Tine Bealtaine” from their 2006 album Pagan Folk. (I just like the music.)
And as I said several years ago, it isn’t often you can say, “That harpist rocks!” But there you go.