The heaviest tourist season runs mid-April through mid-October, with another peak around Christmas—though the tide never really ebbs. Spring is the time to see the countryside and the royal London parks and gardens at their freshest; fall to enjoy near-ideal exploring conditions. In late summer, be warned: air-conditioning is rarely found in places other than department stores, modern restaurants, hotels, and cinemas in London. Winter can be rather dismal, but all the theaters, concerts, and exhibitions go full speed ahead, and festive Christmas lights bring cheery anticipation. For a schedule of festivals, check www.visitbritain.com.