Since the star [Sirius] advances one day every four yea and in order
that the holidays celebrated in the summer shall not fall into winter,
as has been and will be the case if the year continues to have 360 and 5
additional days, it is hereby decreed that henceforth every four years
there shall be celebrated the holidays of the Gods of Euergetes after
the 5 additional days and before the new year, so that everyone might
know that the former shortcomings in reckoning the seasons of the year
have henceforth been truly corrected by King Euergetes....