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The day-and-night (νυχθήμερον) was probably first divided into 24 hours by Hipparchus of Nicaea. [13] The Greek astronomer Andronicus of Cyrrhus oversaw the construction of a horologion called the Tower of the Winds in Athens during the first century BCE. This structure tracked a 24-hour day using both sundials and mechanical hour ...
The natural day (dies naturalis) ran from sunrise to sunset. [6] The hours were numbered from one to twelve as hora prima, hora secunda, hora tertia, etc. To indicate that it is a day or night hour, Romans used expressions such as for example prima diei hora (first hour of the day), and prima noctis hora (first hour of the night). [7]
As each day is divided into 24 hours, the first hour of a day is ruled by the planet three places down in the Chaldean order from the planet ruling the first hour of the preceding day; [2] i.e. a day with its first hour ruled by the Sun ("Sunday") is followed by a day with its first hour ruled by the Moon ("Monday"), followed by Mars ("Tuesday ...
When the Inter-Hour follows the First Hour, the dismissal is said at the end of the Inter-Hour rather than at the end of the First Hour. When the Royal Hours are chanted (the Eve of Nativity, the Eve of Theophany and Great Friday), the First Hour is not joined to Matins as normal, but it becomes the first office in an aggregated office composed ...
This page was last edited on 28 March 2007, at 06:35 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...
The 12-hour clock is a time convention in which the 24 hours of the day are divided into two periods: a.m. (from Latin ante meridiem, translating to "before midday") and p.m. (from Latin post meridiem, translating to "after midday").
The first mechanical public clocks introduced in Italy were mechanical 24-hour clocks which counted the 24 hours of the day from one-half hour after sunset to the evening of the following day. The 24th hour was the last hour of day time. [11] From the 14th to the 17th century, two systems of time measurement competed in Europe: [12] [13 ...
The verse is omitted if the hour begins with the Invitatory (Morning Prayer/Lauds or the Office of Reading). The Invitatory is the introduction to the first hour said on the current day, whether it be the Office of Readings or Morning Prayer. The opening is followed by a hymn. The hymn is followed by psalmody. The psalmody is followed by a ...