I know with walleye fishing which I've honestly done more of walleye fishing than crappie, walleye are extremely temperamental and you can be right in them but for some reason they aren't biting. I'm not a professional crappie fishermen like some of you guys are, so let me ask you this, if you find the fish and are right in them does it really matter much the time of day? I just assume if you dangle a minnow down into a school of crappie the likelihood of getting a bite is very high no matter the time of day.
I can only get out today from about 1 to 4 and I know typically mornings and late afternoons are best.