Hi, yes your explanation rings a bell.
I think I saw this in a BBC program. Might have been horizon but I'm not sure.

I always thought our perception of time should be on the same footing as our 5 other senses.

I'm not sure how understood our internal clock is.

When I wake up in the middle of the night I like guessing what the the time is.

Surprisingly my guess is usually not too far off, often within 20 minutes accuracy.

Weird.