Kittens like babies, need lots of sleep as they are growing. Also, cats are very nocturnal, they like the night. During the day, they like to lie in the sun or somewhere warm and take lots of naps
If your kitten is still an infant then its normal for him to sleep for so long. Just like human babies do. If hes an older kitten then he should be up and about causing mischief and not sleeping so much. If this is the case id take him to the vets to be checked out
she is tired and she needs her rest.
Jay Leno had a line that went something like this: The earthquake upset my cat so much she was only able to sleep for 22 hours yesterday.
Cats sleep on average about 12-16 hours a day.
http://www.petmd.com/cat/behavior/evr_ct_why_do_cats_sleep_so_much
Cats are a part of the feline family therefore they hunt at night and sleep all day
It is not normal for a kitten to sleep all day. Kittens are usually very active and have bursts of intense activity. They often play hard then sleep hard. Your kitten needs to be examined by your veterinarian to determine the source of the lethargy.