Ask HN: Why does time seem to speed up with age?

I've been struggling with the observation that as I age it feels like my life is compressed into a few brief moments instead of feeling like some long chronology. I thought doing more unique activities throughout the year would help as it would create "markers" in my memories, but it hasn't.

Have others struggled with similar thoughts - and as a rather odd question - how can one make their life feel...longer?