Through the Commercial Load Management Program, you can save money and lower energy usage during occasional periods when energy demand is unusually high. The summer on-peak demand period falls between 1 p.m. and 7 p.m. Central Standard Time, Monday through Friday, June through September, excluding weekends and federal holidays. The winter emergency on-peak demand period falls between 6 a.m. and 10 a.m. and 6 p.m. and 10 p.m. Central Standard Time, and operates 24 hours a day from December through February.