The daylight savings time switch causes lower productivity and increased fatal car crashes every year. Moreover, staying in permanent daylight savings time would save energy and reduce crime. See http://www.cnn.com/2015/10/30/opinions/yates-daylight-saving-time-keep-i...
Congress has the power to make daylight savings time effectively permanent by simply making the switch off of daylight savings happen for only a minute out of every year. Alternatively, federal concerted action could convince many states to adopt permanent daylight savings time.