You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "when did the concept of daylight savings time start?" whose answer is April 30, 1916.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did daylight savings time start
Useful Output:

Doc 1: In 1918, the Canadian government formally introduced Daylight Saving Time as a way to increase production during wartime. With the end of the
Doc 2: In America, daylight saving time first became official on March 19, 1918, when the Standard Time Act was signed into law. It allowed for
Doc 3: In the United States, daylight saving time was first used in 1918, when a bill introduced the idea of a seasonal time shift. It lasted seven
Doc 4: Daylight saving time was first introduced in the United States in 1918 under the Standard Time Act as a measure to save on fuel costs during the First World
Doc 5: Year-round daylight saving time (DST), signed into law by President Richard Nixon in January 1974, sought to maximize evening sunlight.