When Is Earth Day 2019 - Earth Day for the year 2019 is cele.ted/ observed on Monday, April 22nd. Monday, April 22nd is day number 112 of the 2019 calendar year with -25 days until Earth Day 2019. More information on Earth Day . Every year, When is Earth Day —April 22—denotes the commemoration of the introduction of the cutting edge natural development in 1970. The tallness of counterculture in the United States, 1970 brought the demise of Jimi Hendrix, the last beatles collection, and Simon and Garfunkel’s “scaffold over troubled water.” war seethed in The Earth Day Network, responsible for running Earth Day, says 40 percent of the world's 11,000 bird species are in decline and 75 percent of the world's coral reefs are under stress. When is Earth Day in other years? The following is a list of dates of when Earth Day will happen in the future, and past dates. Future Earth Day dates When Is Earth Day 2019.