I've always felt this. Someone once said you've lived half your life by sixteen. It feels like it, although it's not true in external terms.
The perception of time is a factor of the amount of experience behind us, so as we age, time goes faster. But we are thrown into the world, and that thrownness also frames our relationship to time. The more insecure our childhood, the more we're at odds with time, and unsettled in the present. For some, as we age, our best hope is to understand what's happening in our lives before it's too late