Dates and Times of the Equinoxes and Solstices
For Any Date and Time Within the Range From 1600 to 2200


Based on the NASA/JPL DE405 Ephemeris Model and the NASA Polynomials For Delta T
Gregorian Year (1600 to 2200) =       Local Standard Time = UTC :   
Dates and Local Standard Times of the Equinoxes and Solstices For Year 2017
In Local Time Zone UTC-05:00

March Equinox     = 2457832.93720243 = 2017 Mar 20 10:29:34 Mon  TT
                                     = 2017 Mar 20 05:28:24 Mon  Local Time

June Solstice     = 2457925.68422149 = 2017 Jun 21 04:25:17 Wed  TT
                                     = 2017 Jun 20 23:24:07 Tue  Local Time

September Equinox = 2458019.33582383 = 2017 Sep 22 20:03:35 Fri  TT
                                     = 2017 Sep 22 15:02:25 Fri  Local Time

December Solstice = 2458109.18685928 = 2017 Dec 21 16:29:05 Thu  TT
                                     = 2017 Dec 21 11:27:54 Thu  Local Time


NOTE:
To adjust for daylight saving/summer time, add 1 hour to computed local time.


Jay Tanner - 2017