3,599 or 3,601 seconds, in order to keep it within 0. The equation of time—above the axis the sundial will appear hour of the star pdf, compared with
3,599 or 3,601 seconds, in order to keep it within 0. The equation of time—above the axis the sundial will appear hour of the star pdf, compared with a clock showing local mean time, and below the sundial will appear slow.
English in terms of hours. 10 am and 10 pm are both read as “ten o’clock”. 10 pm would be “twenty-two hundred”. Fifteen minutes before the hour may be expressed as “a quarter to”, “of”, “till”, or “before” the hour. 9:45 may be read “nine forty-five” or “a quarter till ten”.
24 equal hours, reckoned from the time of sunrise. The original decans used by the Egyptians would have fallen noticeably out of their proper places over a span of several centuries. These were filled to the brim at sunset and the hour determined by comparing the water level against one of its twelve gauges, one for each month of the year. 24 stars over the course of the year and 12 within any one night. The morning and evening periods when the sundials failed to note time were observed as the first and last hours. The Egyptian hours were closely connected both with the priesthood of the gods and with their divine services. Protective deities were assigned to each and were used as the names of the hours.
One of the Hours” or “Hour-Watcher”. Babylonian reckoning of the zodiac. 1 am the first hour of the latter half of nighttime. 12 hours and the night into 3 or 4 night watches. This structure tracked a 24-hour day using both sundials and mechanical hour indicators. The night was eventually also divided into 12 hours. The use of 24 hours for the entire day meant hours varied much less and the clocks needed to be adjusted only a few times a month.