But there's still more to it: take the last two numbers in your year of birth and add your age this year. What's the result???
And even more: in October there were 5 Mondays, 5 Saturdays and 5 Sundays, which only happens every 823 years.
And some more curiosities about the number eleven here.
If all this doesn't give you the creeps, watch this:
Do you recognize the place???
