The idea was slow to gain traction until World War One, when European states sought any strategies to conserve fuel. Germany was the first country to adopt daylight saving time in 1916.

Daylight saving time in the U.S. and some other countries ends on Nov. 3 at 2 a.m. local time, meaning people will gain an extra hour of sleep. Mornings will be brighter but it will get dark ...

But let's say, for example, back in World War One, ... And then in 1966 the Uniform Time Act was standardizing daylight saving time across the entire country except in Arizona and in Hawaii, ...

At 2 a.m., clocks in most parts of the United States will spring forward one hour as daylight saving time begins. ... But only seven months later, World War 1 to a close, ...

But let's say, for example, back in World War One, ... And then in 1966 the Uniform Time Act was standardizing daylight saving time across the entire country except in Arizona and in Hawaii, ...

But let's say, for example, back in World War One, ... And then in 1966 the Uniform Time Act was standardizing daylight saving time across the entire country except in Arizona and in Hawaii, ...

But let's say, for example, back in World War One, ... And then in 1966 the Uniform Time Act was standardizing daylight saving time across the entire country except in Arizona and in Hawaii, ...

But let's say, for example, back in World War One, ... And then in 1966 the Uniform Time Act was standardizing daylight saving time across the entire country except in Arizona and in Hawaii, ...

But let's say, for example, back in World War One, ... And then in 1966 the Uniform Time Act was standardizing daylight saving time across the entire country except in Arizona and in Hawaii, ...

But let's say, for example, back in World War One, ... And then in 1966 the Uniform Time Act was standardizing daylight saving time across the entire country except in Arizona and in Hawaii, ...

But let's say, for example, back in World War One, ... And then in 1966 the Uniform Time Act was standardizing daylight saving time across the entire country except in Arizona and in Hawaii, ...

But let's say, for example, back in World War One, ... And then in 1966 the Uniform Time Act was standardizing daylight saving time across the entire country except in Arizona and in Hawaii, ...