There is a simple clock that indicates the hours, and there is an alarm clock that apart from the role of any clock, it has one more function: to awaken the sleeping and rouse the napping. The first acts only through the sense of sight, and the second by both the sense of sight and the sense of hearing.

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Rosh Hashana is a kind of clock, the alarm clock. Not only does it show the years, and like the clock - the hours, it also awakens, with the hearing sense, the sound of the shofar that calls: " Wake up, you sleepy ones from your sleep and you who slumber, arise."