The info is recorded in the Vedas by the Aryans in the distant past when most likely winter set in in September itself which is a matter of climate change over the millennia.<quoted text>
Come on Joel. There is a vernal equinox and a winter solstice every year. And there is never a winter equinox.
In the Indian subcontinent there's no spring and no autumn.
In India we have 3 well-marked seasons - summer, monsoon and winter.