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Punctuation

 

Commas 

Serial commas are used.

Tom, Dick, and Harry

Exception: On college covers, no serial comma is used with three or more author names (e.g., Kerry Watkins, Gail Anderson & Vincenzo Rondinelli).

Exception: The punctuation in titles of referenced works is not edited to conform to style. For rules regarding the editing of punctuation in quotations, see Quotations.

A comma does not separate a person's name and a suffix that is part of the name or that forms a proper title.

Bill Smith Jr.
William Tilleman III
Dickson CJ

A comma separates a person's name and a degree or honorary designation.

Bill Smith, BA, LLB, LLM
Roger Tassé, QC, OC
John Lennon, OBE

Periods and commas go inside quotation marks. All other punctuation marks (semicolons, colons, question marks, exclamation marks, dashes) generally go outside quotation marks.

The time of day affects "mood."
"Mood," in other words, is affected by the time of day.
A sensitive thing is "mood"; it is affected by the time of day.
Do you believe the time of day affects one's "mood"?

Exception: Punctuation goes outside the quoted name of a ship.

In Sunrise Co Ltd v The "Lake Winnipeg", [1991] 1 SCR 3, the court ruled that … .

No comma is used following a restrictive element unless the syntax of the sentence requires it. In the following examples, “2016,” “Ontario,” “RSO 1990, c B.16,” and “[1986] 1 SCR 103” are the restrictive elements.

It was on January 12, 2016 that a child was born in Toronto, Ontario to happy parents.
It was on January 12, 2016, a day I will always remember, that I returned to Toronto, Ontario, the city of my birth, to meet my long-lost brother.
Section 23 of the Business Corporations Act, RSO 1990, c B.16 provides that shares may be issued at such time as the directors may determine.
R v Oakes, [1986] 1 SCR 103, a landmark case, was decided by the Supreme Court of Canada.

Dashes 

Em Dashes

An em dash is represented by two hyphens (--) or by an em dash (—).

The time of day—that is, morning, noon, or night—affects mood.

En Dashes

An en dash is used in paired opposites.

Canada–US tax treaty
cost–benefit analysis
federal–provincial arrangement
landlord–tenant agreement
male–female relations
parent–child bond
price–earnings ratio

An en dash is used as the prefix of second-level unordered list items. See Lists.

An en dash is used in court judgments and sports scores; a colon is used in proportions.

The court upheld the conviction in a 2–1 decision.
The Montreal Canadiens defeated the Toronto Maple Leafs 3–2 in overtime.
The ratio of water to rum in grog is 4:1.

Parentheses and Square Brackets 

Use parentheses (round brackets) in all references to statutory provisions, even when the references are themselves enclosed in parentheses.

Use of this method is provided for in section 123(4) (and in related provisions, such as section 124(2)).

In other cases where it is necessary to use brackets within brackets, square brackets are enclosed within parentheses.

The method (spelled out in regulations to the Occupational Health and Safety Act [OHSA]) is recommended for all new projects.

Parentheses and brackets in case citations that are themselves enclosed in parentheses or brackets are not changed.

The court referred to Ewanchuk ([1999] 1 SCR 330) and Humaid ((2006), 81 OR (3d) 456 (CA)).

Square brackets are also used to set off authors' and editors' interjections or alterations in quoted material. See Quotations (Authorial and Editorial Changes).