Angus Sinclair, 69, denies the rape and murder of 17-year-olds Christine Eadie and Helen Scott in 1977.
The two girls were last seen leaving the World's End bar in Edinburgh.
At a hearing in Glasgow today, judge Lord Matthews set the trial for October 6 at the High Court in Livingston, West Lothian.
A pre-trial hearing will take place on September 10 at the High Court in Aberdeen.
The dates were set following agreement with Lord Advocate Frank Mulholland QC, prosecuting, and defence counsel Ian Duguid QC.
Sinclair is accused of acting along with brother-in-law Gordon Hamilton, now dead, when the crimes were allegedly committed on October 15 and 16, 1977.