Ok will do. It was last year sept 8 sometime between 7 and 8pm. (Got it from the photo data of what I'm pretty sure is the right set). I took my son and dog for a walk. My son pointed at the western sky where the sun was low by the mountains, backlighting the high clouds to the west.
It was a mostly clear sky, with some clouds over the foothills. In the sky was what I first took to be a passenger jet contrail, I'd say 10-30 km away or so. Only it was a truncated line in the sky, perhaps a few degrees long - say a couple thumbs wide held with an outstretched hand.
It was perhaps a half a degree wide.
And what it looked like, and I know it sounds laughable, was the nexus from the terrible Star Trek generations movie:
It didn't move laterally or horizontally in the sky, but it did seem to twist and shimmer.
My son asked me what it was and I had to admit I didn't know. Of course I didn't bring my cell at the time, and even if I did I don't think it would have showed much.
We watched for about 10 min, then I decided I would quickly walk to my car to get my cell phone, which too maybe 5 mins. When we got back it was mostly gone.
I snapped some photos of what remained, which wasn't much. It basically just looked like a bit of cloud that was twisting and fading. It was soon gone.
It was on the northern edge of fish creek provincial park, looking west.
I don't claim it as evidence of anything, and could have been some weird cloud formation with lighting for all I know. But it sure got my son excited and had me scratching my chin.
I've slightly cropped the first photo to take out my kid and my dog. In the rest I've progressively cropped to show the region of the sky with what was left of the weird ribbon, because it's not obvious. I can send the originals if you guys are super interested, but my wife would kill me if I posted them here.