the bible clearly states they are signs not the instigation of events
One thing people have to wrap their heads around is that prophecy is part of the word of God and therefore it is eternal and not made moot by one passing. Prophecy is brought to fulfillment in a series of escalations. Take for example the prophecy of Jerusalem being sacked. It has been repeatedly. Every time it has happened, it has been a reverberation of God's word echoing thru time. And it will happen again, even more ferociously, in the future. So while we see signs and wonders and fearful things in the tribulation judgment and wrath of the trumpets seals and bowls, that's not to say there isn't a part of that manifesting today and even before now.
Do 4 close knit blood moons mean anything? Just that God gave me a heads up, in that as the end draws closer we'll see more of this kind of thing.