If your on the east coast and calling the west coast you are 3 hours ahead of pacific time so if you call at 9 am EST your calling 6 am PST. Central time is one hour behind eastern standard time.
A clerical officer is a person who handles a wide variety of administrative and clerical responsibilities for a particular employer. Specific duties differ for each position, but clerical officers generally support the activities of executive staff.
An officer is a member of an armed force or uniformed service who holds a position of authority. Used without further detail, the term officer almost always refers to commissioned officers, the most senior portion of a force who derive authority from a commission from a state.