The word is "equinoctial" = equal day and night. It occurs twice a year, on the first day of Spring, and the first day of Autumn.
The Autumn equinox and the Spring equinox .
It is the equinox
The (vernal or autumnal) equinox.
equinox
Spring equinox
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Some summer days are called dog days due to the intense heat that occurs on those days. It is compared to how dogs act sluggish and tired on such days thus giving it the term dog days of summer.
An equinox happens twice a year, when the tilt of the Earth's axis is inclined neither towards or away from the Sun, the centre of the Sun being in the same plane as the Earth's equator. The term "equinox" is derived from the Latin "aequus" (equal) and "nox" (night). Because around the equinox, day and night have an approximately-equal length.
13 days
Arthur Fonzarelli, Happy Days T.V. show.
It is a spring equinox
A regular pentagon. A regular pentagon has five sides of equal length and its five angles are also equal. The term regular implies the notion of equal sides and equal angles.
It is a Rhombus.
The term 'equilateral' means having equal sides. For example, an equilateral triangle is a triangle with 3 sides all of equal length.
A fortnight is basically two weeks (or 14 days). The term was derived in the Old English language. Fortnight was basically an abbreviated term meaning "fourteen nights."
Pea family
A "leg" is the term used in geometry to describe the two sides that are equal in length in an isosceles triangle.
An acre is a measure of area. It is already a measure of length squared, and an acre is equal to 4,840 square yards.The term "square" is incorrectly applied to the term "acre" as the latter is already length squared.
Pea family
Pea family
In apperance, the term "most of the time" may apply in reference to occurrances in length of days. The term "much of the time" may apply in reference to occurrances in length of hours.
First you must decide what length (in days) you want to use for the month. Individual months can have 28, 29, 30 or 31 days. Or, you could use the long-term average, which is the length of the year (365.2422 days) divided by 4. Once you decide on which month length you want to use (in days), just multiply it by 24.
The term "Fortnight" comes from the Old English term "feowertiene niht", or fourteen nights. So a fortnight is anything 14 days in advance. Therefore given that there are 365 days in any given year, there would be 26 fortnights in a year.