1 The Uniform Time Act of 1966 standardized daylight saving time as starting on the last Sunday in April and ending on the last Sunday in October.
2 During the "energy crisis" of the 1970s, daylight saving time began as early as January and February.
3 Since 2007, daylight saving time has begun the second Sunday in March and ended the first Sunday in November.
4 Various studies have examined whether the spring and fall time shifts affect motor vehicle crashes, stock market volatility, work-related accidents, pedestrian fatalities, heart attacks, strokes and school performance. The results have been mixed.
5 Some of the top things people want to know about the shift: Do bars stay open an extra hour when the clock falls back, and do overnight workers get paid for an extra hour? It varies.
Tammie Smith





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