Aardvarks do not hibernate. They are mostly solitary and nocturnal creatures. However sometimes they have been known to come out during the day to bask in the sun. Although, typically these creatures do not leave their burrows until late sometime in the afternoon or sometime after sunset.
Hibernation is the process that occurs in mammals such as birds during the winter. During this process they store food in the fall and then sleep throughout the winter season, and wake up in the spring. If it were not for hibernation, mammals such as the bird would not be able to find their food in the winter, so hibernation makes them sleep and not get hungry, which also slows down their heart rate thus reducing the need for food until spring arrives. Aardvarks do not hibernate and food for them is not scarce during winter months. They also reside in very hot, dry places so hibernating is typically not necessary for them as most are found in places such as deserts.