(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.
The best time to prune grapes is in the winter when the plant is dormant and not actively growing. But grape vines should not be pruned during the most severe cold, so early or late winter is usually the best time. The most suitable time depends on the pattern of winter weather in your area.