A Holiday is a period of time that has been imbued with a steady source of Deific Energy by one or more Deities. Holidays only have an effect in places and to people who are followers of the Deity or Deities that created it. By default, Holidays last one day, though they can be extended with the investment of additional power. You may limit the powers imbued in a Holiday to a smaller segment (e.g. the hour immediately following and before sunset), and you may use any 24-hour period rather than an official day.