The Timings of Events fulfills an important gap in classical astrological literature. The ancient seers with yogic siddhis did not need rules for predicting future events. They clairvoyantly saw the future course of events. The astrological principles are given for those who are not so evolved. The astrological principle aim at helping those who are interested to live a life according to the evolutionary course of their everyday life. The general astrological principles should be modified according to ones individual uniqueness. This applied even in the case of the principles relating to the constitution of man as revealed by the septenary nature of man and the special ray on which the individual is evolving must be taken into account prior to applying the general principles of astrology including those of the timing of events. The ancient astrological savants gave different principles relating to the timing of event which they thought could be helpful for different categories of individuals; they did not intend to provide any exhaustive and well integrated treatise on this special subject. In this way we find different texts giving different principles highlighting creation special features of the subject. Presently there are many books on the subject but a consolidated documentation of these principles is difficult to obtain at one place. Even among the present astrological writers there has been a tendency to deal with certain special categories of the rules. The present study attempts to fulfill this need to some extent in a very modest manner. The present study does not try to present any new theory on the subject but its primary aim is to compile together, giving at one place the most popular principles on the subject.