I know that's "sorta" two questions in one, but I'm stuck in an argument with a guy who says both words can apply to morning half-light. I disagree and think both only apply in the evening.
I think both can only be used about dim light in the evening, but I have to admit I don't know any equivalent words for dim light in the morning.
EDIT: More votes needed! I get the feeling I'm losing here!
Best Answer
Sorry, FF, but twilight is well defined as a technical term strictly relating to degrees of solar elevation. In other words equally as applicable to near sunrise as to near sunset. And if anything, crepuscular refers more likely to morning twilight than it does evening, though it more formally means both.