"Time" not a dimension.

[Anomalocaris]

I mean subjective inasmuch as the effects of time dilation only apply to the person in question.

Not to time itself.

Which person is meaningfully in question, and how does the subjectivity effect this, when clocks on satellites are measured and found systemically and predicatably slower than identical clocks on the ground?

Untutored intuition about time gained through direct animal senses far too dull to detect relativistic effects is worth almost as little as the bible or koran in clarifying the basic properties of time and space.