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The first measure indicates the general sunniness of a location compared with other places, while the latter allows for comparison of sunshine in various seasons in the same location. [1] Another often-used measure is percentage ratio of recorded bright sunshine duration and daylight duration in the observed period.
Sunshine duration. Sunshine duration or sunshine hours is a climatological indicator, measuring duration of sunshine in given period (usually, a day or a year) for a given location on Earth, typically expressed as an averaged value over several years. It is a general indicator of cloudiness of a location, and thus differs from insolation, which ...
A season is a division of the year [ 1] based on changes in weather, ecology, and the number of daylight hours in a given region. On Earth, seasons are the result of the axial parallelism of Earth's tilted orbit around the Sun. [ 2][ 3][ 4] In temperate and polar regions, the seasons are marked by changes in the intensity of sunlight that ...
Daytime. Daytime as observed on Earth is the period of the day during which a given location experiences natural illumination from direct sunlight. Daytime occurs when the Sun appears above the local horizon, that is, anywhere on the globe's hemisphere facing the Sun. In direct sunlight the movement of the sun can be recorded and observed using ...
When does daylight saving time end? In 2024, daylight saving time ends on Sunday, Nov. 3, at 2 a.m. local time. The day will fall back one hour to 1 a.m.
The first season, a mid-season replacement for Dr. Vegas, [2] was the shortest of the six, and spanned 13 episodes from January to May 2005. Seasons two and three aired from September to May of the 2005–2006 and 2006–2007 seasons respectively, but season four was cut short by the 2007–2008 Writers Guild of America strike. Twelve episodes ...
Equinox. A solar equinox is a moment in time when the Sun crosses the Earth's equator, which is to say, appears directly above the equator, rather than north or south of the equator. On the day of the equinox, the Sun appears to rise "due east" and set "due west". This occurs twice each year, around 20 March and 23 September.
where N is the day of the year beginning with N=0 at midnight Universal Time (UT) as January 1 begins (i.e. the days part of the ordinal date −1). The number 10, in (N+10), is the approximate number of days after the December solstice to January 1. This equation overestimates the declination near the September equinox by up to +1.5°.