day light savings
Days between 14 March and 21 April 2010 are 38.
From September 21 until March 21, the shortest shadow points north from the equator. From March 21 until September 21, the shortest shadow points south from the equator.
21
21 of them.
That happens at some point on the equator, at a single moment, on two days of the year ... near March 21 and near September 21.
Adding 186 days to March 21 of any year gives September 23 of the same year.
North pole have no sunshine at all from September 21 until March 21. South pole have no sunshine at all from March 21 until September 21.
The spring equinox is March 21, The fall equinox is September 23
The northern and southern hemispheres have equal daylight and darkness on the equinoxes, which occur around March 21st and September 23rd each year. These are known as the spring (vernal) and autumnal equinoxes, respectively.
Equinox is correct
The name given to March 21 and September 21 is the "equinox". This is when day and night are nearly equal in length, marking the beginning of spring (vernal equinox) on March 21 and the beginning of autumn (autumnal equinox) on September 21.
I don't know what that means!
The two days are known as the Equinox. The spring Equinox (typically June 21) is known as the "Vernal Equinox". The fall Equinox (Typically September 21) is known as the "Autumnal Equinox".
day light savings
We got four seasons not just two: winter is from 21 November to 21 march spring is from 21 march to 21 June summer is from 21 June to 21 September autumn is from 21 September to 21 November
Equinoxes occur twice a year - around 21 March, and around 23 September.