National Day Against Homophobia in Canada
National Day Against Homophobia in Canada is held on May 17. This event in the second decade of the month may is annual.
Energy Conservation Week in Ontario, Canada on May 16 (is about the power of collective action);
National Seal Day in Canada on May 20 (In response to this, Bill S-208 was Royally Assented on May 16th, 2017, designating May 20th annually as National Seal Products Day, and to recognize the importance of the seal hunt for Canada’s Indigenous people, coastal communities and entire population);
Victoria Day in Canada on May 24 (Earliest possible date of the last Monday preceding May 25);
National Patriots' Day or Journée nationale des patriotes on May 24 (Quebec, Canada; celebrated on Monday on or before May 24);
Sun Awareness Week in Canada on May 28 (May 28 - June 3);
Fei Fei Day on June 1 (Vancouver - Vancouver Mayor Sam Sullivan has declared June 1, 2008 a day to commemorate Hong Kong comedienne Lydia Shum. Sullivan designated what would have been Shum's 63rd birthday "Ms. Fei-fei Day.");