It was on 1 July 1858, 150 years ago today, that the idea of natural selection was first presented to the public in a joint reading of Darwin’s and Wallace’s papers at the Linnean Society of London (an event which they did not recognize as important at the time), which makes today analogous to the Fourth of July for the biology revolution. Celebrate! If you’ve got a some fireworks you were saving for the holiday in a few days time, set off a few early.
The Beagle Project has a summary of the significance of this day in scientific history. If you want an anchor point for the Darwin Year, this is a good candidate — let the science flow forth.