Diamond professionals use the grading system developed by GIA in the 1950s, which established the use of four important factors to describe and classify diamonds: Clarity, Color, Cut, and Carat Weight. These are known as the Four C s. When used together, they describe the quality of a finished diamond.
0. Most Americans adjust their clocks for Daylight Saving Time (DST) once in the spring and once in the fall -- but residents of two states, Hawaii and Arizona, have chosen not to observe it. This clocks stands in a city park in Glendale, Arizona. Wikimedia Commons. Arizona participated for one summer.
Like most states in the U.S., Daylight Saving Time is observed in Nebraska, where the time is shifted forward by 1 hour. After the Summer months the time is shifted back by 1 hour. Current rules in effect in USA USA & Canada clocks are now on: STANDARD TIME. Standard Time began: Sunday 5 November 2017 02:00 local time.