User blog comment:Thailog/Ep. 207 "Depths" discussion/@comment-71.126.79.212-20120610151904/@comment-3094698-20120610192135

dick was robin for 3 years prior to the begining of the show, i believe he became nightwing about a year into the timeskip because by this stage he would have been robin for a long time, if thats the case thats a 3 year window for jason to show up and die with 1 year to train tim. it could easily fit into the timeline