Almost as long as I can remember, summertime is pasta salad time.
As early as my late teens, I started making cold pasta salads: First meal was dinner, then easy lunch for several days after that. Almost always vaguely Mediterranean, I’ve found this sort of olive oil-based pasta salad is more versatile, and stays nicer longer than, say, a mayo-based pasta salad.
Also, I personally just view the oil-based salads as “cleaner” somehow. Not sure there’s a basis in fact for that, though.