Average hours per day (American Time Use Survey) This term refers to the average number of hours spent in a 24-hour day (between 4 a.m. on the diary day and 4 a.m. on the interview day) doing a specified activity.
Usually a cats first season is somewhere between 4 and 10 months old with average age around six months. Siamese and Burmese cats are quite precocious and will often have their first season at 4 months of age.
Starting from about five months till ten months of age, female cats mature sexually and have their first estrous cycle. The average age for a cat going into heat is when they are around 6 months old. This is the time during the reproductive cycle when the female cat is most fertile and is most likely to conceive.