You are right Asif bro. I too accidentally happened to visit this show, as I was going to Pakistan Monument and just saw crowd at R&J Garden so diverted my car to see whats happening here. It was a great colorful show. I also visited the Birds and Flower show which is held in Spring Season, which you are talking about.
Can you let me know that how do you find about these types of events that happen in Islamabad. Cuz if i hadn't been visiting to Pakistan Monument at that day, I would have missed the show.