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Within the polar circles (north of the Arctic Circle and south of the Antarctic Circle), each year will experience at least one day when the Sun remains below the horizon for 24 hours (on the winter solstice), and at least one day when the Sun remains above the horizon for 24 hours (on the summer solstice).
The planetary hours are an ancient system in which one of the seven classical planets is given rulership over each day and various parts of the day. Developed in Hellenistic astrology, it has possible roots in older Babylonian astrology, and it is the origin of the names of the days of the week as used in English and numerous other languages.
The menologia rustica told farmers to expect 12 hours of daylight and 12 of night in March. The spring equinox was placed March 25. The tutelary deity of the month was Minerva, and the Sun was in Pisces. Farmers were instructed in this month to trellis vines, to prune, and to sow spring wheat. [2]
Days in winter are not as short as in the northern part of the continent, the average hours of daylight in December, January and February is 10.3 hours [8] (for comparison: London [9] or Moscow [10] or Warsaw [11] – about 8 hours). The shortest day of the year – 21 December – sunrise is around 7:00 and sunset is around 17:00.
The amount of heat energy received at any location on the globe is a direct effect of Sun angle on climate, as the angle at which sunlight strikes Earth varies by location, time of day, and season due to Earth's orbit around the Sun and Earth's rotation around its tilted axis.
Its summer months are typically dry and modestly warm, ... Mean monthly sunshine hours: 60.2 91.0 134.8 185.0 222.5 226.9 ... (within a calendar day). ...
In each quarter there are three months of 42 sols and a fourth month of 41 sols. The pattern of seven-day weeks repeats over a two-year cycle, i.e., the calendar year always begins on a Sunday in odd-numbered years, thus effecting a perpetual calendar for Mars. [25]
In 2019, the Washington State Legislature passed Substitute House Bill 1196, [56] which would establish year-round observation of daylight saving time contingent on the United States Congress amending federal law to authorize states to observe daylight saving time year-round. [57] Tennessee and Oregon also passed bills in 2019 for year-round ...