Each round will represent 2 years. So at the end of each round I will age all sims by 2 years.
I won't be playing each family for a set number of days now, i'm sticking to seasons. Each family will be given a season in the calender. Round 6 currently looks like this:
Summer 2000- Mason, Saenz
Autumn 2000- Uni
Winter 2000- Henshaw
Spring 2000- Brockman
Summer 2001- Walker
Autumn 2001- Uni
Winter 2001- Mason 2
Spring 2001- Brockman 2
Pregnancies will last 3 seasons to represent 9 months. If a sim gets pregnant in summer 2000, they'll be in the second trimester autumn 2000, third trimester winter 2000 and will give birth spring 2000.
I think that's about it. I've already played the Mason house, with aging turned off and I just took a day off each of the dogs at 6pm since pets age faster than their owners (I may change this too if it doesn't work out. I was looking at Fudge and Luna and thinking how weird it was for them to stay tiny puppies for 2 years so decided to age pets as normal.) and it seems to have worked out okay so i'll get that update posted tomorrow!