"time zone." YourDictionary, n.d. Web. 11 October 2018. <http://www.yourdictionary.com/time-zone>.
time zone. (n.d.). Retrieved October 11th, 2018, from http://www.yourdictionary.com/time-zone
Any of the roughly longitudinal divisions of the earth's surface in which a standard time is kept, the primary division being that bisected by the Prime Meridian. A typical time zone averages 15° of longitude in width and observes a clock time one hour earlier than the zone immediately to the east.