text: The fourth month includes 20 July, the date of the heliacal rising of Sirius.   In the first year the people carried on using the old calendar, anticipating festival dates by five days.   As each day is named after a god, it is important to observe the celebrations on the right day.   Thus the fravasis festival, which in the old calendar was kept between sunset on 30 Spandarmad and sunrise on 1 Frawardin, was now observed throughout the epagomenai.   In the second year of the reform, the old 30 Spandarmad was the new 25 Spandarmad, so from then on the festival covered eleven days, up to the new 1 Frawardin.   Five days was considered enough for other festivals, however.
  In all the lands where the Persian calendar was used the epagomenai were placed at the end of the year.   To offset the difference between the agricultural year and the calendar year (the tax-gathering season began after the harvest) the start of the araji (land-tax) year was delayed by one month every 120 years.   A Roman historian, Quintus Curtius Rufus, describing a ceremony in 333 BC, writes:
  The magi were followed by three hundred and sixty-five young men clad in purple robes, equal in number to the days of a whole year; for the Persians also divided the year into that number of days.