Earth Day Earth Day 2021 is an event observed annually on April 22. It is a day held to demonstrate and promote environmental awareness and calls for the protection of our planet. Today, Earth Day, 2021 is celebrated in more than 193 countries each year. Happy Earth Day Set a Reminder Enter your email address below to receive a reminder message. Email address Select the amount of Days before the event -- Select Days Before Event -- 1 Day 2 Days 3 Days 1 Week Submit Date and Time Thursday Apr 22, 2021 Set a Reminder Enter your email address below to receive a reminder message. Email address Select the amount of Days before the event -- Select Days Before Event -- 1 Day 2 Days 3 Days 1 Week Submit Share × Print Email Add to Calendar Facebook Twitter LinkedIn Tell a Friend × Select Calendar Type × Google Yahoo iCal (Outlook, Apple, or other)