1990
According to La Presse (September 7, 1990)
October 10-11, 1990 Drummondville
October 12-13, 1990 Salle Maurice-O'Bready, Sherbrooke
October 16, 1990 Théâtre Saint-Denis, Montreal (postponed)
October 17, 1990 Théâtre Saint-Denis, Montreal (postponed)
October 18, 1990 Théâtre Saint-Denis, Montreal (postponed)
October 19, 1990 Théâtre Saint-Denis, Montreal
October 20, 1990 Théâtre Saint-Denis, Montreal
October 27-28, 1990 Ottawa
October 30-November 2, 1990 Quebec
The Gazette (October 16, 1990)
Singer Celine Dion has developed laryngitis and has had to postpone three Theatre St. Denis performances scheduled for this week, DKD Productions announced yesterday. Tickets for tonight's show will be honored at a rescheduled concert on Tuesday, Oct. 23. Tomorrow night's concert has been moved to next Monday, and Thursday's concert has been moved to Wednesday, Oct. 24. Performances this Friday and Saturday will be presented as scheduled, DKD said
October 22, 1990 Théâtre Saint-Denis, Montreal
October 23, 1990 Théâtre Saint-Denis, Montreal
October 24, 1990 Théâtre Saint-Denis, Montreal
But I'm not sure whether she gave the October 19-20 concerts or not.

November 11, 1990 Théâtre Saint-Denis, Montreal
According to Passion Celine Dion she also gave a concert at the Grand Theatre de Quebec on December 6, 1990.
The Gazette (December 20, 1990)
Celine Dion tour suspended
On the advice of her doctor, singer Celine Dion has postponed the rest of her concert tour for a two-month period, effective immediately. According to a communique from promoter Donald K. Donald, Dion is still suffering the effects of a bout with laryngitis, coupled with exhaustion from a series of performances at Theatre St. Denis. Performances in Quebec City, Sherbrooke, Ottawa and Trois Rivieres, scheduled for January and February, will be rescheduled in the spring
1991
March 5, 1991 86 Street Music Hall, Vancouver (source)
March 8, 1991 Arden Theatre, St. Albert (source) (review)
There is an article published on the Calgary Herald on March 10, 1991 titled "Dion Gets Crowd Dancing in Aisles", so I guess the concert in Calgary could have been on March 9.
According to this file, her debut concert in Calgary was a show for 117 people. Maybe it was this concert.
March 11, 1991 Walker Theatre, Winnipeg
Here's the ticket!
March 15, 1991 Winter Garden Theatre, Toronto
On May 19, she started a tour of Quebec (37 concerts in 25 cities/towns according to the official biography).
According to Passion Celine Dion she gave a concert at the Grand Theatre de Quebec on June 4, 1991.
June 19, 1991 Montreal Forum, Montreal
August 1, 1991 Festival des voiles de Longueuil - Marie Victorin Waterfront Park
August 3, 1991 Vieux Port de Quebec
On August 28 and 29, she was scheduled to perform in Sept-Îles and Baie-Comeau.
I don't know if those 37 concerts include the festivals/free concerts where she sang.
August 25, 1991 Canadian National Exhibition Grandstand (Michael Bolton / Celine Dion / Oleta Adams) (source)
October 9, 1991 Cardinal Cushing Auditorium (at Mount Saint Vincent University), Halifax
It seats 700 people. It was her first concert in Halifax. Mike Robinson was the opening act.
Francois Massicotte opened 75 concerts for her in 1990-1991. (source)
There are many dates missing.