Announcers usually work in well-lighted, air-conditioned, soundproof studios. The broadcast day is long for radio and TV stations-many are on the air 24 hours a day-so announcers can expect to work unusual hours. Many present early-morning shows, when most people are getting ready for work or commuting, while others do late-night programs. The shifts, however, may not be as varied as in the past because new technology is allowing stations to prerecord programs and air them at a later time, especially for the overnight hours. Announcers often work within tight schedules, which can be physically and mentally stressful.