The word you want us 'Equinox'.
In any given year there are two equinoxes. They are
The Vernal Equinox ( 21 March - Spring) and
The Autumn Equinox ( 31 September - 'Fall').
NB There are also two Solstices. They are
The Summer Solstice ( 21 JUne - Longest day and Shortest night in ther Northern Hemisphere )
The Winter Solstice ( 21 December - Shortest day and longest night in the northern hemisphere).
This means lengh times width
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.
length times width equals the area of a rectangle. length times width equals the area of a rectangle. area
Perimeter equals to 2 times the length plus 2 times the breadth. Area equals to length multiply by breadth
a = L x W: area equals length times the width. p = 2L + 2W: perimeter equals 2 times the length plus 2 times the width so L = (p - 2W)/2
length plus width equals perimetre
Length times width equals area
do the length times the width and that equals the area
they do because area equals length times width
Area equals LxW (Length times width)