Rather than springing forward the first Sunday in April, the clocks will change March 11. The time will jump from 1:59 a.m. to 3 a.m. on the second Sunday in March.
Some clocks will need help with the change. Many electronic devices, such as VCRs or computers, are pre-programmed to switch automatically to daylight-saving time but may not be programmed to adjust to the new start date.
The extended daylight-saving time, which also includes an extra week in the fall, comes as part of the federal Energy Policy Act of 2005.
The goal of the change is to conserve energy.
Daylight-saving time has been observed for more than 60 years as a way to maximize sunlight hours, sending clocks ahead one hour in the spring and reverting back to normal time in the fall.
Sunlight hours decrease during the winter when the Northern Hemisphere points away from the sun, said Todd Lindley, a meteorologist with the National Weather Service.
The hemisphere receives less solar radiation, or sunlight, than during the summer, when it points toward the sun.
For some residents, the early start date will take some adjustment.
Daylight-saving time has started the first Sunday in April for more than three decades, but it is not uncommon for it to begin earlier during times of a declared energy crisis.
In 1974, it started Jan. 6. And a year later, it started Feb. 23, according to the U.S. Naval Observatory.
Also, for three years during World War II, daylight-saving time kicked off Feb. 9.