This first concert preceded the release of Vollenweider's second album, Behind the Gardens - Behind the Wall - Under the Tree, which was released worldwide in autumn of the same year.
The concert will precede by eight days their first performance in the Soviet Union since they emigrated.
A half-hour concert by the Marine Band and the 80-voice Justin Lawrie Choir preceded the 5:00 P.M. ceremony.
Only a choral concert, a quartet of trio recitals and a couple of children's events precede the holiday.
Wurlitzer-organ concerts precede the Saturday-night shows.
The coffeehouse, incidentally, will continue its celebration by later presenting such artists as Christine Lavin, John McCutcheon, Dar Williams and the Women of the Calabash, each of the 8 o'clock concerts preceded at 7 by a "Teachabout" sing-along session with members of the Clearwater Chorus.
In live concerts preceding the album, Fish had originally claimed as a teaser that the next album would consist of only two tracks, 'Side One' and 'Side Two'.
The concerts will precede the July 6-8 summit meeting in Scotland of the Group of 8 industrialized nations.
Gala tickets to the concert and receptions preceding and following the concert are $150 to $500.
"Oh, Sister" became a concert favorite during the fall tour preceding Desires release.