I read scriptures, I see old buildings — but the experience is always now

This question is about time and perceiving the time. So I am perceiving now. Everything I perceive is always in this moment. And the concept of time is no, like time like past, present and future. But the experience is always now, only this now. Okay, but then I look outside, for example, and see different old buildings or I read some ancient scripture or look at past photograph. And this sense of past arises, but it's not experienced or proven. So how can I know that time passes?