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 time zones start in the us?" whose answer is November 18, 1883.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did time zones start in the us
Useful Output:

Doc 1: In 1883, American and Canadian railroads began using four different time zones  time and time zones were made official. We're still
Doc 2: At that point, the nation's five time zones were proclaimed: Eastern, Central, Mountain, Pacific, and Alaska. The Act also included a provision
Doc 3: Nov. 18, 1883 was a chilly Sunday in New York City. In fact, cold days had become the norm across a swath of the nation, resulting from the
Doc 4: In the US the major time zones were set by the railroads in 1881. The 1884 Conference was called to try and reach some international concensus.
Doc 5: United States railroad companies began utilizing Fleming's standard time zones on November 18, 1883. In 1884 an International Prime Meridian