User blog comment:Dtuck010/Nightwing's Birthday/@comment-5145408-20120613223405/@comment-4454131-20120615010242

It could just be Batgirl passing by and saying happy birthday, just get mentioned briefly during the episode you know. There's a bunch of stuff they could do in terms of character development by bringing it up. Also, with how Depths ended, I feel like the next episode will be the following day, no gap.