Summer Solstice, a time when the Sun God is at the height of power, "Hail Lugh", a bitter sweet time when the Sun God celebrates his maturity with the Goddess. But as life constantly changes the Sun God is aware of his coming sacrifice, he accepts the inevitable.
The Goddess never dies but changes, she presides over life, death and rebirth, the God however does die he shows us with maturity and sacrifice.
This is also shown in the epic battle of the Oak king and Holly King, The Oak King gives way to the Holly King until Mid Winter. This shows us the never ending progression of the seasons, moving now towards the darkening, then slowly up again to the light.
Midsummer another Fire festival, but also involves water, representing the Goddess she who blesses us with the waters of life and magic. Fire ever blazing and if not checked by water can blaze out of control, how wonderful is our wheel of the year, ever changing, ever magic. ever balancing.