2nd Amendment Day
2nd Amendment Day is held on May 12. Pennsylvania, United States. Its purpose is to raise awareness of and support for the fundamental right to keep and bear arms, which is codified in the Second Amendment to the United States Constitution. This event in the second decade of the month May is annual. 
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The Constitution doesn't grant or create rights; it recognizes and protects rights that inherently exist. The Second Amendment to the United States Constitution was adopted in 1791. It is part of the Bill of Rights, the first ten amendments. It gives American citizens the right to bear arms. This means that people can keep weapons such as guns to protect themselves. Interest-balancing means we balance a right with other interests.
The Court explains that in order to keep the nation free (“security of a free state”), then the people need arms: “When the able-bodied men of a nation are trained in arms and organized, they are better able to resist tyranny" (p.24-25).
Similar holidays and events, festivals and interesting facts
Minnesota Statehood Day on May 11
National “Eat What You Want” Day in USA on May 11
Train Day on May 11
National Animal Disaster Preparedness Day in US on May 11 (Held on the second Saturday of May);
Mother’s Day on May 12 (Anguilla, Antigua and Barbuda, Aruba, Australia, Austria, Bahamas, Bangladesh, Barbados, Belgium, Belize, Bermuda, Bhutan, Bonaire, Botswana, Brazil, Brunei, Canada, Cambodia, Cayman Islands, Central African Republic, Chad, Chile, China, Colombia, Congo, Dem. Rep., Congo, Rep., Cote d'Ivoire, Croatia, Cuba, Curaçao, Cyprus, Czech Republic, Denmark, Dominica, Ecuador, Equatorial Guinea, Estonia, Ethiopia, Faroe Islands, Fiji, Finland, Germany, Gabon, Gambia, Greenland, Ghana, Greece, Grenada, Guyana, Honduras, Hong Kong, Iceland, India, Italy, Jamaica, Japan, Kenya, Latvia, Liberia, Liechtenstein, Macau, Malaysia, Malta, Myanmar, Namibia, Netherlands, New Zealand, Pakistan, Papua New Guinea, Peru, Philippines, Puerto Rico, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Samoa, Singapore, Sint Maarten, Slovakia, South Africa, Sri Lanka, Suriname, Switzerland, Taiwan, Tanzania, Tonga, Trinidad and Tobago, Turkey, Uganda, Ukraine, United States, Uruguay, Vietnam, Venezuela, Zambia, Zimbabwe);
National Nutty Fudge Day in USA on May 12
National Apple Pie Day, National Fruit Cocktail Day and National Hummus Day in USA on May 13
Top Gun Day on May 13
Warm Cereal Day in USA on May 13