Last year's summertime calendar brought us 6/6/6, the apocalyptic number of the beast. Some predicted the Antichrist would appear on that hot as hell June afternoon, but it didn't happen.This summer will bring 7/7/7, which is sacred and mystical, according to various traditions. On that day Miami will host the Sacred Sevens Selebration. (In case you haven't checked, July 7, 9007, will fall on a Saturday; of course, the town will be either underwater or nuked by then.) It's all organized by the people at MysticalFlorida.com, who put on the Tropical Fairy Festival at Coral Castle every October. "This festival will raise positive energies and provide an outlet for people to experiment with their spirituality," says Atina Komar, the festival's organizer, "and honestly, days that don't appear very often give us an excuse to throw a party."The festivities will be held at the Unitarian Universalist Church in South Miami. There will be drum circles, live bands, magicians, spiritual workshops on well-being and self-healing, as well as performances by jugglers, dancers, and singers. There will also be games and a costume contest for children.