Cygnus the Swan is also called the Northern Cross. It's a larger constellation, but fainter than the Southern Cross. Around Christmas time you can see the cross in an upright manner (the Swan would be flying towards the horizon), just above the horizon right after sunset. Is this a sign that Christianity is the true religion and Christ was born near Dec 25? I don't think so.
Nevertheless, I'm a bit surprised more Christians today don't use it to argue their point. Evidently, what religious people consider evidence for their belief system doesn't necessarily match what the scientifically-inclined might suspect they would think of as evidence.