Duration of insolation
Daylight duration refers to the total length of time over a specified period, be it day, week, month or years. Sunshine duration refers to the duration of sunlight over a given period of time.
Daylight and night are determined by the rotation of the Earth on its axis. Daylight occurs when a specific location on Earth is facing the Sun, allowing sunlight to illuminate that area. In contrast, night occurs when that same location is facing away from the Sun, resulting in darkness.
It is called the "Equinox" and occurs during the winter season.
The shortest length of daylight in Canada typically occurs around the winter solstice, which falls on December 21st or 22nd each year. During this time, regions in Canada experience the fewest hours of daylight in a day before the days start to gradually lengthen again.
The length of daylight increases as you transition from winter to summer. This change occurs because the Earth's tilt causes the northern hemisphere to be more directly exposed to sunlight during the summer months, resulting in longer days.
The month in which the hours of daylight and darkness are closest to those of March is September. This is because both months are near the equinoxes, when day and night are approximately equal in length. In March, the vernal equinox occurs, and in September, the autumnal equinox does, resulting in similar day length patterns.
squat-thrust
Day and night are determined by the rotation of the Earth on its axis. Day occurs when a specific location on Earth is facing the sun, experiencing daylight. Night happens when that location is facing away from the sun, experiencing darkness.
When the days get longer, it is typically referred to as "daylight lengthening," which occurs during the spring season as the Earth tilts on its axis and moves in its orbit around the sun. This phenomenon culminates in the spring equinox, when day and night are approximately equal in length. As spring progresses, daylight continues to increase until the summer solstice, the longest day of the year.
A traveler moving north on this date observes that the daylight period becomes shorter at the date of : December 21
Daylight occurs because the Earth rotates on its axis, allowing different parts of the planet to receive sunlight as it orbits the Sun. When a location on Earth is facing the Sun, it experiences daylight, while the opposite side is in shadow, resulting in nighttime. The tilt of the Earth's axis also affects the angle and intensity of sunlight, contributing to variations in day length and brightness throughout the year.
The longest day-length in India occurs around June 21st, which is the summer solstice. On this day, the Northern Hemisphere is tilted towards the sun, resulting in the longest period of daylight of the year.