The past light cone of an object constrains what past events can affect an object regardless of whether the object has awareness of not. So you don’t need memory to experience time, even if you need memory to understand it.

That's a very interesting point. I had never considered it. I have always conflated the perception of change with change itself.

What you wrote was quite profound to me! Thanks.

Indeed. And the direction of memory is one of the things that determines the arrow of time, perhaps the most important one.

If I remembered tomorrow yesterday, then today exists to make it true.

Measurement, awareness, and memory, are not required for time to exist. These are all things that make observation possible, but time could still exist even if the universe were just a fog of loose atoms bouncing around with no self awareness.

Of course. I was just trying to point out time is a necessary but not sufficient condition for awareness.