Sunday night sky watching?

I have lived in three places that are all quite far away from each other at least 1000 miles and on Sunday nights it is like military coms back to work or what? I always see this plane I think was labeled as the triangle etc. It has a slow pulsed beacon dead center in the under body, I believe it is made by locheed as a drone plane video on youtube had it somewhere on here.

Anywho has anyone noticed this? If so why Sunday night?