Equinoxes and Solstices Calculator For Any Year Year Range: 1600 to 2200
Calendar Year (1600  to  2200)	Time Zone Offset Neg | Pos  =  W | E UT
========================================================================== EQUINOXES AND SOLSTICES DATES AND TIMES For the Year 2019 =========================================================================== LT (Local Time) in Time Zone UT-05:00 Julian_Date_LT Calendar_Date Time_LT EVENT ---------------- --------------- -------- ----------------- 2458563.20678066 2019 Mar 20 Wed 04:58 PM March Equinox 2458655.95431958 2019 Jun 21 Fri 10:54 AM June Solstice 2458749.61795154 2019 Sep 23 Mon 02:50 AM September Equinox 2458839.47179930 2019 Dec 21 Sat 11:19 PM December Solstice =========================================================================== UT (Universal Time) Julian_Date_UT Calendar_Date Time_UT EVENT ---------------- --------------- -------- ----------------- 2458563.41511399 2019 Mar 20 Wed 09:58 PM March Equinox 2458656.16265291 2019 Jun 21 Fri 03:54 PM June Solstice 2458749.82628487 2019 Sep 23 Mon 07:50 AM September Equinox 2458839.68013264 2019 Dec 22 Sun 04:19 AM December Solstice =========================================================================== TT (Terrestrial Dynamical Time) TT − UT Julian_Date_TT Calendar_Date Time_TT Delta_T EVENT ---------------- --------------- -------- --------- ----------------- 2458563.41593575 2019 Mar 20 Wed 21:58:57 +00:01:11 March Equinox 2458656.16347467 2019 Jun 21 Fri 15:55:24 +00:01:11 June Solstice 2458749.82710663 2019 Sep 23 Mon 07:51:02 +00:01:11 September Equinox 2458839.68096597 2019 Dec 22 Sun 04:20:35 +00:01:12 December Solstice =========================================================================== =========================================================================== SOME GENERAL INFORMATION All computations are based on the NASA/JPL DE405 ephemeris model, the IAU 2000B theory of nutation and the NASA polynomial expressions for remote Delta T estimation. The greatest uncertainty is in the Delta T estimate used to compute the UT and LT (Local Time) of the events. Internally, all core computations are for the TT time scale which is then converted into the corresponding UT and LT. Setting the local time zone offset to ±00:00 equates the local time to UT, which is the same thing. =========================================================================== DEFINITIONS OF THE SEASONS The seasons are being defined geometrically as occurring at 90-degree points in the Earth's orbit. The intervals between them varies, but the angular definitions remain constant. March and September equinoxes = Sun declination 0 degrees June and December solstices = Sun RA at 06 and 18 hours ---------------------- March Equinox Sun on celestial equator crossing from south to north. Beginning of northern spring and southern autumn. On an equinox date, days and nights are closest to equal in length in both hemispheres. This happens twice each year, once in March and again in September, when the sun crosses the celestial equator. ---------------------- June Solstice Sun at RA (Right Ascension) 6 hours (90 degrees). Beginning of northern summer and southern winter. It is the shortest day of the year in the southern hemi- sphere and the longest day of the year in the northern hemisphere. -------------------------- September Equinox Sun on celestial equator crossing from north to south. Beginning of northern autumn and southern spring. On an equinox date, days and nights are closest to equal in length in both hemispheres. This happens twice each year, once in March and again in September, when the sun crosses the celestial equator. -------------------------- December Solstice Sun at RA (Right Ascension) 18 hours (270 degrees). Beginning of northern winter and southern summer. It is the shortest day of the year in the northern hemi- sphere and the longest day of the year in the southern hemisphere. ===========================================================
Program by Jay Tanner v1.2.2 - Revised: Tuesday, November 05, 2019 at 09:44 AM UTC