Winter Is Coming, and This Is How We Know

Every year, WNYC broadcasts the Winter Solstice concert put on by sax player and environmental activist Paul Winter, his ensemble, and musical guests from around the world.  It’s a musical journey through the longest night of the year, at the Cathedral of St John the Divine. 

This year’s broadcast occurs during the exact moment of the Winter Solstice — this year, at 11:49pm in the Eastern time zone. 

But what does the term “winter solstice” actually mean? And what is happening in the skies?

It all comes down to one number: 23.5.