I just guestimate the age of my Sims when I tell their stories. But I will have to figure out just how old my Sims are. I plan on using aging off when the now Teens age up to YAs and head off to Uni. Three Terms is how long? Since the Teens are all about one Sim-day apart in age, should I count each birthday as one year? (I'm sending them all at the same time to uni.) So that by the time the youngest teen is a YA, three years has elapsed? With three Terms does that equal six years including the time they all aged up? (YA for me begins at age 18 as it does here in the U.S.) So that the second Teen is twenty-three by the time of graduation? In my mind the first two are about eighteen months apart in age. They all came boom, boom, boom and boom. Only the youngest kid in that household is much younger. He's still a Child until the second eldest kid becomes a YA and the Child becomes a Teen. Interesting how the game gave them the exact same birthdate.
I would count the seasons, all four to make a year, in your case. You can change your Sims' birthdays, too. Just created a Birthday party for them and voila. They will age up when you choose. Generally, I have done this to set birth order, but I have since been able to fix that via MCCC, instead.
