Time is said to be eternal. It is said that it has neither a beginning nor an end. Yet men are able to measure it as years, months, days, hours, minutes and seconds. They have also given meanings to the words – past, present and future. True, time has a meaning. It moves. What was yesterday is not today. What is today will not be tomorrow. Yesterday is gone. Today is and tomorrow is yet to come. Yet time is said to have no holiday. It exists always.