Original Magic: The Rituals and Initiations of the Persian Magi - Stephen E. Flowers Ph.D. 2017

Timing of The Inception of The Work
Initiation into Magic

All indicators point to the Iranians being the greatest pioneers of calculating nativities and predicting the outcome of events based on the timing of the inception of a thing (activity, institution, etc.). Taking this into account you should begin your work on an auspicious day. The ideal start date is Nowruz (New Year) on the Spring Equinox. Alternatively, you may begin on the first day of any one of the Zoroastrian months. At this time the influence of the power of that particular cycle is strongest, and the work will proceed along the thirty-day cycle in a natural and uninterrupted way. Some insist that it is best to begin magical work on one’s own birthday. Ultimately, it is important to begin and never miss a day of working. If a day is for some unavoidable reason missed, you should start over on another auspicious day. Never be discouraged; no work toward the good is lost.