In Europe, Mid-summer celebration originates from the time before Christianity; it was celebrated as a sacrifice time in the sign of the fertility.
The solstice itself has remained a special moment of the annual cycle of the year since Neolithic times. The concentration of the observance is not on the day as we reckon it, commencing at midnight or at dawn, but the pre-Christian beginning of the day, which falls on the previous eve. In Paganism, Midsummer's Eve is considered the greatest festival of the year.
As Christianity entered pagan areas, midsummer celebrations came to be often borrowed and transferred into new Christian holidays, often resulting in celebrations that mixed Christian traditions with traditions derived from pagan Midsummer festivities.
The summer solstice also marks the longest day of light in the year and this begins on the 21st of December at 5:47pm and goes till the end of the following day.
It is the celebration of ripening, the bliss of union and the turning into dark... Creation and Fire is celebrated. It marks the Middle of Summer and it a festival of colour and fun.
To have your our marking of the time:
Build yourself a bonfire..scatter flowers and foliage around the base, make it beautiful!!
Create a small beautiful offering of fruits and colour.
When ready light the bonfire plus some incense too and let the bonfire get going, then when you are ready thank the universe for all that you are provided with. Place the offering at the front of the house...
Proceed to play music either through a sound system or you can sit around and create your own. Feel free to dance and enjoy a feast of fresh food and drink.
The intention is the most important part of any ritual...
So if you feel you need to say anything in particular then say it but match it with your intention.
You can do a mini scaled version of this and it will still be as potent as a large scale ritual... It is your choice...