The vernal equinox marks the moment the sun crosses the celestial equator – the imaginary line in the sky above the Earth’s equator – from the southern to the northern hemisphere. Here in New England it will happen Sunday, March 20, at 12:30 AM EDT. At spring equinox people all over the world can see the sun rise exactly due east and set exactly due west.
While the sun may be predictable, March weather is not. In fact, March is appropriately named for the Roman war god, Mars. March is a month of battles between warm and cold, between winter’s refusal to leave and spring’s insistence on coming.
In coming days this week we'll post more entries from our Field Guide to March, heralding the sun’s arrival.