system
Given the following post, respond as if you're commenting on Reddit:
human
Eli5 How do sundials keep accurate time, if the seasons change, wouldn't you have to reposition it each season?
gpt
They didn’t keep accurate time compared to how time today works.

They kept accurate time relative to sunlight, which for most of history, was more than good enough. Knowing roughly how much daylight you had left was more important than an arbitrary number describing the hour.