Time Confusion

My wife, Dolores, never quite got the hang of the 24-hour military clock. One day she called the orderly room and asked to speak with me. The person who answered told her to call me at the extension in the band rehearsal hall. "He can be reached at 4700, ma’am," the soldier advised.

With a sigh of exasperation, my wife responded, "And just what time is that?"