Ayana · Seasons
Solstice & Equinox Dates
upcoming · times in IST
The four turning points of the solar year — the equinoxes and solstices — with their exact dates and times, computed from the Sun's tropical longitude with the Swiss Ephemeris.
Winter Solstice
Tue, 22 Dec, 2026, 02:20 am
Vernal Equinox
Sun, 21 Mar, 2027, 01:54 am
Summer Solstice
Mon, 21 Jun, 2027, 07:40 pm
Autumnal Equinox
Thu, 23 Sept, 2027, 11:31 am
Winter Solstice
Wed, 22 Dec, 2027, 08:12 am
Frequently Asked Questions
When is the next equinox or solstice?
The next is the Winter Solstice on Tue, 22 Dec, 2026, 02:20 am IST. The full upcoming list is above.
What are solstices and equinoxes?
They are the four points in the Sun's yearly path: the two equinoxes (Vernal and Autumnal), when day and night are nearly equal, and the two solstices (Summer and Winter), the longest and shortest days. They mark the Sun's tropical longitude reaching 0°, 90°, 180° and 270°.
How do these relate to Uttarayana and Dakshinayana?
The Sun's northward course (Uttarayana) begins around the Winter Solstice and its southward course (Dakshinayana) around the Summer Solstice. These ayanas are astronomically tied to the solstice points.
How are these dates calculated?
The exact moments are found by tracking the Sun's tropical longitude with the Swiss Ephemeris and pinpointing when it crosses each 90° mark.