8760 hours? That's a little off, and a bit extreme. (Game year is right at 8500 hours iirc). As finalrune just stated...it's cyclical. It's actually just over an 86 hour cycle (window should pop once every 3.6 days)--4 Windows roughly every 2 weeks.

Auroras/Stellar Glare become most prominent roughly every 3 months on a cycle, just like the real life auroras in Alaska (most prominent around the equinoxes). The timing may be off from real life, not sure (one peak is December in RL, I just spotted it in the middle of Jan, but it may have been coming off the peak)--but the pattern is similar.

Once you spot when it is taking place, you can plan for it. Having it pop regularly once every 90 or so game days is hardly hard to shoot for if you have access to some sort of vanadiel calendar app--there are tons of them on the web.