The practice of daylight savings time in the U.S. began over a century ago, and it is now an unofficial symbol of winter's approach. Here's what to know.

Now that fall has begun and the days continue to get shorter, those in the Northern Hemisphere creep towards the semi-annual time change.

1) Manually turn any analog clocks back before going to bed on Saturday, Nov. 1, the night before Daylight Saving Time. All digital devices, such as computers, TVs and cell phones, will automatically ...