In addition, ethyl butyrate is often also added to orange juice, as most associate its odor with that of fresh orange juice. Ethyl butyrate is one of the most common chemicals used in flavors and fragrances.n addition, ethyl butyrate is often also added to orange juice, as most associate its odor with that of fresh orange juice. Ethyl butyrate is one of the most common chemicals used in flavors and fragrances.
We have different time zones because if we all set our clocks to the same time noon would be the middle of the day in some places, but it would be morning, evening and the middle of the night in others. Since different parts of the Earth enter and exit daylight at different times, we need different time zones.
A time zone is a region that observes a uniform standard time for legal, commercial, and social purposes. Time zones tend to follow the boundaries of countries and their subdivisions because it is convenient for areas in close commercial or other communication to keep the same time.he offset from UTC changes with daylight saving time, e.g. a time offset in Chicago, which is in the North American Central Time Zone, would be  â06:00  for the winter (Central Standard Time) and  â05:00  for the summer.