Actually look closely at Garbage-pedia. It states EIS as Sept. 99 in the text. But the info box under the Valu-Tran pic says 'Maiden flight' Sept. 2 1998, 'Introduction' Oct. 12 1999.
So it has three differing dates, or so it seems.
Now continue reading the text...
It states that Valu-Tran placed an order in 1995 for the MD-95, which went to Boeing during the 1997 swallowing of the McDonnell Douglas.
But you didn't answer the fundamental question. Will we see the aircraft as the MD-95 or as the 717?