Cleveland Abbe
In order to compile his information, Abbe required a time-keeping system that was consistent among the stations. To accomplish this he divided the United States into four standard time zones. He published, in 1879, a paper titled "Report on Standard Time". In 1883, he convinced North American railroad companies to adopt his time-zone system. In 1884, Britain, which had already adopted its own standard time system for England, Scotland, and Wales, helped gather international consent for global time. In time, the American government, influenced in part by his 1879 paper, adopted the time-zone system.
Quintana Roo
On February 1, 2015, Quintana Roo officially adopted a new time zone, Southeastern, which is five hours behind Coordinated Universal Time (). Quintana Roo does not observe daylight saving time, so Southeastern Time is constant throughout the year (that is, it does not shift forward in the spring and back in the fall). Southeastern Time (ST) is the same as Eastern Standard Time (EST) and Central Daylight Time (CDT). This means that in the winter, Quintana Roo has the same time as regions observing EST, such as the eastern U.S., eastern Canada, Cuba, and Jamaica; and in the summer, Quintana Roo has the same time as regions observing CDT, such as central Mexico.