Canadian Forces Day is a holiday that celebrates the Canadian Armed Forces, their heritage, and their personnel. It is observed annually on the first Sunday in June. Although it is not a public holiday, it is marked with relevant events and activities across the country.
The first Sunday in June is Coastal Cleanup Day in Russia. This local observance is related to International Cleanup Day organized by PADI (Professional Association of Diving Instructors), the world's largest recreational diving membership and diver training organization.
June 5 is World Environment Day. This observance was established by the United Nations General Assembly in 1972, the first celebration took place in 1973.
National Cancer Survivors Day is an annual observance held primarily in the United States on the first Sunday in June. It was inaugurated in November 1987 and has been observed each year ever since.