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.
Non-spayed female cats will go into heat or estrus seasonally in the spring and fall and may go into heat several times during the season. The period of heat lasts an average of about a week, but can vary from three to 14 days. Your cat will exhibit many behaviors during estrus that you should expect.