By Mary Drier (Contact / Staff Bio)
October 31, 2009 - 08:47 a.m. EST

MICHIGAN — Daylight Savings Time ends this weekend.

At 2 a.m. Sunday, clocks are to be set back one hour.

Not everyone knows the time change dates back to when railroads were the main form of travel.

Official time zones were set back in 1883 by the U.S. Railroad Industry, and Congress signed the time-zone system into law in 1918. At that time, the only federal agency was the Interstate Commerce Commission. Then, in 1966, Congress transferred the responsibility to the Department of Transportation when it was created.

Those standard times stood until changes in the law that were made in 2005 went into effect in 2007, which stipulated that daylight saving time must switch back to standard at 2 a.m. on the first Sunday in November, and move ahead one hour on the second Sunday in March.