Why did daylight savings time start in the US?

Related questions

1. Is Atlantic Standard Time the same as Eastern Standard Time?
2. Are we currently in EST or EDT?
3. What GMT is EDT?
4. Will there be daylight savings time in 2019?
5. When did daylight savings time start and why?
6. Is Eastern Time and Eastern Standard Time the same?
7. What is the difference between Daylight Savings Time and Standard Time?

Tags

1. #daylight
2. #saving
3. #march
4. #zones
5. #beginning
6. #standard
7. #clocks
8. #established
9. #states
10. #january
11. #energy
12. #ahead
13. #provide
14. #summer
15. #implementing
16. #united
17. #begin
18. #enacted
19. #preserve