In HSY, what happens with high school graduation if you have aging off?

Haven't hard about the 4 week graduation thing...

The graduation ceremony happens when your teen ages up. However, if the teen has A, is doing well in after-school activity, and has a skill maxed out (at least that's how the game says it is), they can graduate early. You get that offered at first, but you can do it through computer.

So no, they shouldn't graduate after 4 weeks.