It could be, but there are seven. Seven is an important number in FT. Seven year time skip, dragons vanished 7/7/777, Natsu met Lucy 7 years after Igneel vanished, Layla died July 7th, 777. There are 7 Dragon slayers, Fire, Steel, Sky, Lighting, White, Shadow and Poison. Lots to do with 7 :)
posted over a year ago
I see, that does make sense, and Natsu is 17 years old Lol, say it on fairy Tail Wikipedia, iI could be wrong though