I feel like, because you can see the moon moving towards the sun for the hours leading up to the eclipse, and see it moving away from the sun in the hours afterward, you’d be able to put two and two together even if your sense of scale is way off.

Plus there’s gonna be institutional knowledge whether you’re agricultural or not - eventually you’re going to see multiple eclipses, and eventually your tribe will have elders telling kids about them, and eventually someone will think to record when they happen and start being able to predict them.