Emergency Daylight Saving Time Energy Conservation Act
The Emergency Daylight Saving Time Energy Conservation Act () is a law that made Daylight Saving Time effective year-round for a two-year trial period. This trial period was intended to begin on January 6, 1974, and ended on April 7, 1975, but lawmakers ended the experiment early on October 27, 1974, and did not make the change permanent due to concerns about darkness on winter mornings. External links
 Full text and legislative history of the Act

References

1973 in American law
United States federal energy legislation
Daylight saving time in the United States
93rd United States Congress