(faster shutter speed / less light). Aperture (or f-stop) refers to the size of the opening in the lens of the camera when a picture is taken. As you are focusing the camera, the lens is wide open with the largest aperture supported by your lens.
The harvest season typically falls between August & October in the Northern Hemisphere and February & April in the Southern Hemisphere. With various climate conditions, grape varieties, and wine styles the harvesting of grapes could happen in every month of the calendar year somewhere in the world. In the New World it is often referred to as the crush.
Chris Loxton explains the wine production process in Sonoma. In the Fall is when the grapes get harvested and wine production kicks in. This is called crush, as in crushing the grapes, and there really is no better time to come to Napa or Sonoma than when the grapes are being harvested. The aroma of ripening fruit in the air mixes with the excitement of anyone who has a stake in wine, from the growers to the drinkers.