Oh, he wasn't claiming that Christian fundamentalists originated the idea; I guess the idea would be that some fundamentalist he knows "rediscovered" it in the Bible recently. I think it was supposed to come from the Old Testament. That would allow at least three possiblitlies. 1. There is evidence in the Old Testament of belief in a 360 day year; it filtered in from the Babylonians. 2.There is evidence there for that belief, which was derived from some other source. 3, also entirely possible; my acquaintance just got the "fact" from someone who wasn't even competent at literalistic fundamentalist interpretation of the Bible.

Further drift; actually, competent fundamentalist interpretation in an oxymoron. If you're a fundamentalist, the Bible is inerrant. Therefore, it's consistent throughout; in history, morality, details of prophetic forecast, and everything else. To make the Bible absolutely consistent, you have to twist the plain language severely on a regular basis.