It's the astronomical equivalent of an urban legend: social media is buzzing with the idea that The Red Planet will appear in the heavens as large as the full moon on the evening of August 27th. Which means we'll have a double moon.
Yes, and if you look closely, you'll see a cow jumping over both.
Mars will never appear to be as large as our moon. It just won't happen. Like, never.
In 2003, Mars and the Earth came closer than they had been in 60,000 years. We're talking slightly closer in space, not closer as in bosom buddies. That event isn't going to repeat itself, and you would have needed to have been an astronomer 10 years ago to appreciate the event fully.
So go out and enjoy the moon. If the sky isn't cloudy, it'll be fantastic.