when cats get older they are less active just like humans, there is no set amount of sleep they should be getting, or shouldn't be getting. some cats are also nocturnal (they sleep in the day and are awake at night) so you may think he is sleeping as well at night when he could really be up playing and doing normal cat things.
if you mean how many hours you should sleep in a year it would be 3,650 hours of sleep for a regular year not a leap year
They should have 8 or more hours of sleep in a day.
A four year old should sleep 12 hours a day
A nine year should be getting 9-12 hours of sleep.
At least 8 hours of sleep.
At least 8 hours of sleep.
8 hours
A ten year old should sleep at least 8 to 9 hours a day.
A 5 year old should sleep around 10 to 11 hours and adults should sleep around 7-8 hours.
13 hours sleep per day?
A 17 year old man should have about 7.5-8 hours of sleep each night.
An 8 year old should get 8 hours of sleep because that's what a doctor would recommend