Giant moon

It depends on the planet. Does your planet have a mostly molten core and mantel, because Large moons would cause not only earth quakes but topographical changes as the tides of liquid earth underneath swelled and ebbed.

Also volcanic activity would be feirce. plate tectonics would be wildly more active. Between a few hundred years and a millenium the surfcace of the world could completely change. Nomadic life would likely be the best choice, and the cycles of the moon would play a huge role in determining where the best places to locate temporary villiages would be.

Since those places would be the same for everybody there may be differant tribes or clans that meet regularly a migratory locations.

Floods and sunami would be common and regular, so coastal cities would likely be rare and distance from rivers would be greater then you'd expect, so when they flood there is no catastrophic loss of life and supplies. But close enough to gather your water supplies. There may be highly fertile land because of the recirculating minerals and flooding periods. The flooding of the nile was what made egyptian civilisation posably one of the most fertile lands ever for it's time.

If your moon is large enough the planets wobble would be effected to the point of the earth going through small seasons during the greater seasons, due to the earth moon lever being closer to binary planet style then a satalite. So on any given month you would have a differance of distance to the sun of the same size as the distance to the moon

I don't know if that is clear or not but it's something to keep in mind.

Thank you very much.

I had the tidal effect in mind, but not so much the tectonic activity.
Your post has been very useful to me.

Good luck with your writing.

oh hey I forgot there would also be light level differances at night. a full moon might be more like a cloudy day, and there may not be anything like we would consider new moon. The shadow their planet casts on the moons lit surface may be faitn redish hole in the center that darkers toward the center. The shadow would move across the moons surface depending on the time of year and location of the observer.

Solar eclipses might be the darkest thing these people ever see because in our world the moon and sun fit so well over each other that the solar corona is a ring around the moon, but for a larger moon the shado would be totally enveloping the earth.

Needless to say the calander of these people may be highly intricate, and based on these solar and particularly lunar cycles.