Where does time go?

I mean seriously, all through high school I complained about how slow life was moving. Now it just seems to zip by. It's line you hit the magical age of 20 and poof you hit hyper speed. Does it slow down again at 40? In some ways I hope so.
It's also funny to me how with RW we wanted him to grow and achieve milestones quickly,we were impatient new parents excited to see him develop. Now with Ginny it seems to be opposite, we want her to slow down. I sometimes forget she is not 6 months old and needing me for everything. In a month she will be one and that just seems crazy!
She has been such a great baby, both my kids have great temperaments, someone must be looking out for me haha!
Being a mom is the greatest thing I have ever done, and it's really all I want to do.