Important Dates related to Environmental Issues:

1. Earth Day - April 22nd
- Celebrated annually on April 22nd since 1970
- A day dedicated to raising awareness about environmental issues and promoting conservation efforts

2. World Environment Day - June 5th
- Observed annually on June 5th since 1974
- A day dedicated to promoting environmental action and awareness worldwide

3. International Day for Biological Diversity - May 22nd
- Celebrated annually on May 22nd since 2000
- A day dedicated to promoting biodiversity conservation and sustainable use

4. World Oceans Day - June 8th
- Observed annually on June 8th since 2009
- A day dedicated to raising awareness about the importance of oceans and promoting conservation efforts

5. International Coastal Cleanup Day - Third Saturday in September
- Observed annually on the third Saturday in September since 1986
- A day dedicated to cleaning up beaches and coastlines worldwide

6. Clean Air Day - June 17th
- Celebrated annually on June 17th since 2019
- A day dedicated to raising awareness about air pollution and promoting efforts to improve air quality

7. Zero Emissions Day - September 21st
- Observed annually on September 21st since 2008
- A day dedicated to promoting a zero-emissions lifestyle and reducing carbon footprints

8. National Tree Planting Day - Second Saturday in June
- Observed annually on the second Saturday in June
- A day dedicated to planting trees and promoting reforestation efforts

Overall, these important dates serve as reminders for individuals and organizations to take action towards protecting the environment and promoting sustainability.