While both Stijloor and Nandakumar are correct, in my experience it is difficult to ensure that the suggested process (extend date, calibrate prior to use, cross-reference to standards prior to use) is consistently followed out, and to provide evidence that it is.
As a general guideline, I would suggest performing the calibration as scheduled; this is not an onerous or time-consuming task, and will (probably) be easier in the long run.