Yes, it seems like something is going to happen.
Last week I saw the numbers "1883" in a dream I had.
1+8 = 9
8+3 = 11
Could this also be conformation concerning the upcoming Olympics and the things you've mentioned about the Jewish calendar?
The Holy Spirit also revealed to me that the 18 also means revelation chapter 18. That whole chapter speaks of the destruction of Babylon.
I was born in London, I also live there (have my whole life). London is pretty big. I think anyone out of the vicinity of the Olympics should be fine. I live quite a long way away from where it will be taking place. It's people who are travelling on trains near it's location, just casually going about their business or going to work, those are the people I'm worried about, of course, as well as the people who are actually going. Apparently there will be combined disasters, no just at the Olympics itself.
I also had a dream ages ago where I saw mass mayhem taking place in London (around the London bridge area) and I also saw the Big Ben. There was just chaos happening all around London. When I woke up from that dream my spirit felt so heavy, as if I had just come our of a war, and I felt God's sorrow. It wasn't my own sorrow. When I had this dream I hadn't even yet done any research concerning what may take place at the Olympics and London. I was oblivious to it all, then I started doing research etc... Then it made more sense.
"Owe no man anything, but to love one another: for he that loveth
another hath fulfilled the law." ~ Romans 13:8