Time Zones

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Across
  1. 2. what time zone are we in?
  2. 4. what do all people set their times to?
  3. 6. how many time zones are in the US?
  4. 7. you can ____ through different time zones(*on a phone*)
Down
  1. 1. how many time zones are their worldwide?
  2. 3. Greenwich mean time uses ___ time?
  3. 5. time zones help keep regular ____.