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.
Summation. 1  Heat, oestrus, and estrus all refer to heat cycles in cats. 2  The breeding season in cats lasts almost year-round. 3  Heat cycles can start as early as four or five months in a female kitten. 4  Heat cycles in cats last from several days to two weeks or more.