So. Year of the lens and year of the camera.
But will it also be year of the sensor?
Canon has not had one of those years since the 5D2.
1DX, 5D Mark III, 5D Mark II, 16-35mm f/4L, 24-70mm f/2.8L, 24-105mm f/4L, 70-200mm f/2.8L , 70-200mm f/2.8L IS II, 100-400mmf/4.0-5.6L, 50mm f/1.4, 85mm f/1.8, 85mm f/1.2L, 100mm f/2.8L, f 135mm f/2L, 580EX II, 600EX-RT