April 1991
No. Su Mo Tu We Th Fr Sa
14 31 1 2 3 4 5 6
15 7 8 9 10 11 12 13
16 14 15 16 17 18 19 20
17 21 22 23 24 25 26 27
18 28 29 30 1 2 3 4
  • In 1991 year Earth Day fell on
    fourth Monday of April

Earth Day dates in the following years:

Su Mo Tu We Th Fr Sa
Apr. 2025
22
Apr. 2026
22
Apr. 2027
22
Apr. 2028
22
Apr. 2029
22
The dates the holiday is observed are marked with a dotted line (applies to federal holidays). Date calculations are based on your computer's time.

Earth Day 1991

Monday, April 22 Earth seen from space Earth as seen from the International Space Station

In every walk with nature, one receives far more than he seeks.

John Muir

Earth Day is an annual event that aims to showcase support for environmental protection and promote a harmonious relationship with nature. Originally established on April 22, 1970, the celebration has since grown in popularity, with many countries observing it around the time of the March Equinox (usually on March 21 or 22). In 2009, the United Nations General Assembly proclaimed April 22 as International Mother Earth Day, to be observed globally each year.

Earth Day offers an excellent opportunity to organize outdoor activities that promote environmentalism, such as litter cleanups and tree planting. It's also an occasion to raise awareness about the negative effects of environmental degradation, including pollution and global warming. Moreover, Earth Day is a chance to promote the significance of pro-ecological endeavors, such as ecologically friendly agriculture and wastewater treatment projects.