3 ms·

March 25th is roughly the spring equinox. January 1st is roughly the shortest day of the year. Both seem like reasonable choices.

• drcongo 6y ago
  December 21st is the shortest day of the year.
  • ectopod 6y ago
    Sometimes. Sometimes it's the 22nd. Neither of which are a long way from January 1st. Hence "roughly".