What is the Hour of the Day, and how is it calculated from the sunrise and sunset times?
The Hours given here are based on and ancient Greek system. Similar to the system of planetary hours used by many ceremonial magicians and astrologers, they are relative to sunrise and sunset and vary by season and location. Check out our page on the Hours for more information. There are twelve hours to the day: one before dawn, own after sunset, and ten through full daylight. The night hours are not calculated here, and are given simply as “Night”. The hours are easily calculated by finding the number of minutes between sunrise and sunset, dividing by ten, and allotting that amount of time for each. The Hour Calculator will automatically do this calculation for you if you enter the sun rise and set times for the day at your location. Sun rise and set times worldwide can be looked up at the Astronomical Applications Department of the US Naval Observatory. The sunrise and sunset times used on the Breviary page are for Hubbardston Mass (W72N42. EST), and may be wildly inaccurate for your
