Use the data below to estimate the date when the equinox would occur.?

Question

Date september 15 2007 sunrise 6:28 am , sunset 6:59 pm

Date september 16 2007 sunride 6:29 am sunset 6:57 pm

Answer 1

"On a day which has an equinox, the center of the Sun will spend a nearly equal amount of time above and below the horizon at every location on Earth and night and day will be of nearly the same length."

http://en.wikipedia.org/wiki/Equinox