"The discovery ... of the Higgs boson will mark a watershed in particle physics. In the future, the calendar of particle physics will surely be divided into BH (before Higgs) and AH (after Higgs), with 2012 being year 0. The discovery of the Higgs will signpost the direction that both theoretical and experimental physics will take in the decades to come."
January 1, 1970
https://en.wikiquote.org/wiki/Higgs_boson