Twice, at the Summer and Winter Solstaces.
At the spring and fall equinox.
Equinox
The time from one sunrise to the next is about 117 Earth days. The length of day and night are roughly equal at about 58 Earth days each.
The duration of Days of Eclipse is 2.22 hours.
Length of days are never equal
The Autumnal and Vernal Equinoxes, occurring around March 21st and September 23rd, are the two days of a given year that day and night are equal in duration. This happens because contrary to popular belief, the sun does not rise and set directly overhead, or perpendicular to the horizon for most of the year. The path that the sun travels across the sky is not perfectly centered, except of course during the equinoxes. Because the sun is directly overhead at 12 o'clock noon during the equinox, if you were to travel to the equator, you would not cast a shadow.
3 Twice. On the Autumnal equinox and on the Vernal equinox.
Equinox
Two times
These are the Vernal [or Spring ] and Winter Equinox . These days differ slightly and should be marked on your calendar.
Because of the tilt of earth's axis.
Because of the tilt of the Earth's axis.
Because of the tilt of earth's axis.
Saturday
The Equinox (Vernal & Autumnal) There are only two times of the year when the Earth's axis is tilted neither toward nor away from the sun, resulting in a "nearly" equal amount of daylight and darkness at all latitudes. These events are referred to as Equinoxes
The two days of the year when there is exactly 12 hours of night and 12 hours of day are the equinoxes. They occur around the 20th of March and the 23rd of September each year.
The equinox is when, twice each year, day and night are of equal length (about 22 September and 20 March).
114 days