One is the Rainbow Bridge interpretation and series of World Meditations, physically based on Avebury, my beloved spiritual home, and also in the Rift Valley in Zimbabwe. Visit their website to learn how you can be involved in spirit. Having lived on and farmed a large tract of the Marlborough Downs, and spent much time at Avebury and Silbury Hill in the mid-70's, I feel a strong affinity with this area, and am delighted to learn of the healing energy being generated there. The other is the 'rolling blackout' - a practical demonstration and protest against the prevailing world energy policies and lack of real action on Global warming. To participate, simply turn off your lights, and anything else you can unplug between 7 and 10pm your time on 21st.
Solstice is a process rather than a point in time.
Then, for those experiencing Winter Solstice, the first sign of the returning Spring comes with the slightly increased length of daylight, and this is the event celebrated as Yule, Christmas, and in many other ways as 'The Return of the Son'. For those celebrating the Summer Solstice, the days are now observed to begin drawing in.