The Canadian Conference of Catholic Bishops (CCCB) has decreed that the Holy Days of obligation to be observed in Canada are: all Sundays of the year, Christmas Day and the Feast of Mary, Mother of God.
The feasts of the Epiphany, the Ascension, the Holy Sacrament of the Body and Blood of Christ (Corpus Christi) are transferred to the following Sunday.
For other Memorials, Feasts, Solemnities, daily readings, Gospels and other important information, you can download (PDF) a liturgical calendar from the CCCB website.