Hmm. Pennywise operated on a 27 year cycle. Maybe Cthulhu does the same, but at 1MM the scale.

The Season Finale cycle

Mmm... maybe that's the length of a yuga? :)

That's just the next game round of the universal player. Started as a hack to prevent overflowing of some variables. /s

Seriously, sounds more like human pattern matching at work. Especially considering the class of events that get mixed together. Cosmological chart reading.