In the context of the query, the operative term is the noun "holiday," which in Canada refers to a statutory day of rest from work. September 11 is not a statutory holiday in Canada at either the federal or provincial level. Consequently, businesses, schools, and government services operate on a normal schedule on this date.
While not a public holiday, the date is formally recognized as the National Day of Service. This designation was established to honor the memory of the victims of the 2001 terrorist attacks, including the 24 Canadian citizens who perished, and to pay tribute to the first responders. Commemorative activities, rather than closures, mark the day. These typically include lowering the national flag to half-mast on the Peace Tower in Ottawa and on all federal government buildings, as well as moments of silence and memorial services organized by various communities and organizations.
Therefore, the status of September 11 in Canada is one of solemn observance and remembrance, not a holiday providing a day off from work. The official focus is on encouraging acts of service and charity to honor the spirit of compassion and unity that arose in the wake of the tragedy, distinguishing it clearly from statutory holidays that involve widespread closures.