surest sign of spring in the US

The cherry blossoms are in full bloom in Washington, DC. This is the nation's signature sign of spring, and the city celebrates their arrival with a festival.  Up north in Boston, our editor, Kellie Gutman, spotted her first daffodil yesterday. Her postcard to the Padeia School, in Atlanta has been filled in with the date of April 5 and sent to them for their charting of the speed of spring's advance.

Meanwhile, in a recent comment, Robin Dally googles the number of people showing any interest in "the signs of winter".

See also:
Keeping an eye out for the first daffodil
Spring's progress