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On November 18, 1883 the General Time Convention established this in North America.

  • Daylight Savings Time
  • The five time zones
  • The Gregorian calendar
  • Universal Mean Time

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HistoryNet Staff (7/18/2024) Daily Quiz for August 21, 2018. HistoryNet Retrieved from https://www.historynet.com/quiz180821/.
"Daily Quiz for August 21, 2018."HistoryNet Staff - 7/18/2024, https://www.historynet.com/quiz180821/
HistoryNet Staff 8/21/2018 Daily Quiz for August 21, 2018., viewed 7/18/2024,<https://www.historynet.com/quiz180821/>
HistoryNet Staff - Daily Quiz for August 21, 2018. [Internet]. [Accessed 7/18/2024]. Available from: https://www.historynet.com/quiz180821/
HistoryNet Staff. "Daily Quiz for August 21, 2018." HistoryNet Staff - Accessed 7/18/2024. https://www.historynet.com/quiz180821/
"Daily Quiz for August 21, 2018." HistoryNet Staff [Online]. Available: https://www.historynet.com/quiz180821/. [Accessed: 7/18/2024]