Sorry dude but marching with King isn’t something that would get blurred with other stuff. The marches were big events and his death was off the scale in the level of coverage it got. Best believe anyone that marched with a man that got assassinated a few years latter would remember it. And those that didn’t would know they didn’t. This is nothing like blurred conversation and everyone knows it.
Sorry sister, maybe in your normal life with few activies, some people are in the mist and have more events going than others in their lives!