• December Solstice

    First Day of Winter. Winter solstice is an astronomical phenomenon marking the shortest day and the longest night of the year.

  • March Equinox

    First Day of Spring. March equinox marks the moment the Sun crosses the celestial equator - the imaginary line in the sky above the Earth's equator - from south to north. On the equinox, night and day are nearly exactly the same length - 12 hours - all over the world.