Ummm, yes, we do get to see it, after it has been converted to more pilot useable presentations such as Pitch Limit Indicators (Eyebrows), Low speed indication on the speed tape, plus a few hundred other functions, some of which you probably don't want to encounter, such as Stall Warning etc.
A day is a unit of time. In common usage, it is an interval equal to 24 hours. It also can mean the consecutive period of time during which the Sun is above the horizon, also known as daytime. The period of time during which the Earth completes one rotation with respect to the Sun is called a solar day.
A degree day is computed as the integral of a function of time that generally varies with temperature. The function is truncated to upper and lower limits that vary by organism, or to limits that are appropriate for climate control.