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www.reference.com/article/earth-day-358a56b28a71a70c

Gaylord Nelson founded Earth Day. It was renamed officially by the U.N. in 2009 as International Mother Earth Day, and some schools and communities celebrate the day for an entire week. Also, the first Earth Day was celebrated on April 22, 1970.

www.reference.com/article/long-day-earth-ad2154ec08c8a82c

According to Universe Today, the duration of a day on Earth is the time it takes for the planet to complete a rotation around its axis. The Earth’s rotation takes 23 hours, 56 minutes and 4.1 seconds.

www.reference.com/article/good-earth-day-games-5a154bba60aad226

Great Earth Day games include treasure hunting, geocaching, recycle racing, crafting and planting. Recycle racing is a simple game in which groups of people clean up parks or public areas, making sure to divide recyclables from the trash that cannot be recycled. The person or group who collects the

www.reference.com/article/interesting-earth-day-2eb15d8fde2e967

Earth Day began in the late 1960s following the Vietnam War and was originally created with political aims. The Earth Day holiday on April 22 actually follows the first Earth Day of the year on March 20, the spring equinox.

www.reference.com/article/causes-day-night-earth-22f312d4f514752f

The Earth experiences days and nights as a result of the planet spinning on its axis. As the planet spins, the part that is facing the sun experiences day, while it is night for the part facing away from the sun.

www.reference.com/science/day-night-earth-39fa0b14bd3d075b

Day and night on Earth are caused by the planet's rotation around its axis and its position relative to the Sun. The Earth rotates from west to east, so places further east experience daybreak and nightfall sooner. One hemisphere of Earth is in daylight at any given time.

www.reference.com/article/earth-day-activities-kids-7d5c7df52298fe4

Depending on the age of a child, Earth Day activities include making bird feeders out of pine cones, peanut butter and seed; upcycling jars to make candle votives; and decorating old cans to hold buttons, coins or flowers. Planting flowers and trees is another way to commemorate Earth Day.

www.reference.com/article/important-d-day-680a2c53761de44e

D-Day occurred on June 6, 1944 when the Allies invaded Normandy, successfully turning the tide of World War II. Over 156,000 allied troops landed on 50 miles of beach in the largest seaborne invasion in history, liberating Northern France over the course of the next three months.

www.reference.com/article/earth-s-motion-causes-day-night-5ac8dc3eeb87aa5

The spinning and rotating movement of the earth along its vertical axis causes the difference between day and night. The differences between light and darkness on the earth's surface are caused primarily by the earth’s rotation along a vertical axis. This constant spinning motion accounts for hourly

www.reference.com/article/world-aids-day-819943741ca4d45e

The first of December of each year marks World AIDS Day to encourage people worldwide to show support for those who are living with human immunodeficiency virus, or HIV, and acquired immunodeficiency syndrome, or AIDS. It is a day of remembrance for those who have died from the disease, according to