I had a MONTH similar to that in Sept. 2015. It started on Labor Day. We own a cottage on a steep hill overlooking a local lake (180 acres.) After everyone left the big family picnic I decided to troll for a while. As I approached the far end of the lake I saw a big flock of seagulls picking and pecking on the calm surface like chickens. As I got closer they flew off. THEN I saw lots of ripple rings from feeding fish! Having my ultralight and some Gulp worms I quickly cast to them. The little bobber hit the water and immediately got attacked by fish! Of course it disappeared and I set the hook on a nice bluegill. It was fast and furious non-stop action until I had 25 in the basket.
Wondering if that event was just unique, I returned the next morning. The gulls were gone, and lake was flat, and I could see groups of ripple rings in several places. In short order I was out and on them again. Same as the day before. A fish a minute....or less.
Now I told you that story so I can tell you this. My wife notified me that I fished those bluegills 27 days IN A ROW and 7 of those days were morning/evening double trips. I wish I has kept count of the total number I landed in that month. I've got a lot more years fishing than most fishermen have been alive (You too Frank.) and that month stands as the fastest action I have EVER had in my whole life.
Was it a once in a lifetime event? I doubt that. With Labor Day coming, I will be watching the surface of the lake with the hope that what happened last year will be repeated.