Canada Legalization of Same-Sex Marriage

In 2003, Ontario and British Columbia became the first two provinces to legalize same-sex marriage. The federal Civil Marriage Act came into force on 20 July 2005, making same-sex marriage legal across Canada. Canada became the fourth country to permit same-sex marriages, after the Netherlands (2000), Belgium (2003) and Spain (2005). Since then, all provinces in Canada have recognized same-sex marriages. Marriage itself falls under federal jurisdiction in Canada. But the provinces regulate the solemnization of marriage (the formal ceremony that is either civil or religious). They also grant marriage licenses.

https://www.thecanadianencyclopedia.ca/en/article/same-sex-marriage-in-canada