Grand jury is so named because traditionally it has greater number of jurors than trial jury, called a petit jury (from the French word petit meaning small).
Although mice tend to come out in the night when most of the occupants of the house are asleep or immobile. This allows them to stealthily infiltrate any of your food bags, crumbs etc. During the day time, mice will normally not come out, but if opportunities exist then they surely can.
Another skunk myth is that skunks only come out at night, and therefore skunks seen during the day must have rabies. Not true. Wild skunks will usually come out in the evening and early morning hours, resting at night and sleeping during the day. However, in the winter and early spring, when they have young, they may be hungry and will forage for food at almost any time of day. Skunks do not hibernate in winter. The time to worry is if you see an adult skunk who appears to be paralyzed or who exhibits odd behavior, such as circling, screeching, self-mutilation, unprovoked aggression, or uncharacteristic tameness. Call your local animal control officer or police department for assistance.