Earth Day was first celebrated in the US in 1970. There was a plan for Earth Day in September 1969 in the US. However, it was not really due to global warming, but to conserve Earth's greenery and also reduce the amount of carbon dioxide produced by man.
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november 11
Christmas...wow
Thanksgiving is celebrated in the United States because of the first Thanksgiving with the Pilgrims and the Native Americans.
In the US, Veterans Day was originally called Armistice Day, and was celebrated after the end of WWI.
Colorado was the first state to celebrate Columbus Day. They celebrated it in 1906.
United States of America was the first to celebrate Earth Day. However, during the same year, a few countries also participated in it. In September 1969, there was a proposal for Earth Day in the US, and it came true the next year.
Massachusetts
Boston
Wisconsin. See reference below. ~ TCK, AZNews results for What is the history of "Earth Day"?Telegraph.co.ukEarth Day 2010: A Brief History of Earth Day and a Look Back at 40 ...‎ -2 hours agoEarth Day is intended to inspire awareness and appreciation for the Earth's environment. It was founded by US Senator Gaylord Nelson of Wisconsin as an ... Gather.com - 896 related articles »The DIY Genius of the Original Earth Day‎ - Wired News - 398 related articles »
In 1969 at a UNESCO Conference in San Francisco, peace activist John McConnell proposed a day to honor the Earth and the concept of peace, to first be celebrated on March 21, 1970, the first day of spring in the northern hemisphere.
Jamestown Virginia
In Canada and US Labor day is celebrated on the first monday of September and in most of the other countries it's on 1st May.
Boss's Day is celebrated as a secular holiday by the US, Canada and Lithuania. It is celebrated every year on October 16th. The first one was in 1958.
There are many holidays not celebrated in the US. The Queen's Birthday, ANZAC day and Australia Day are just three of many holidays not celebrated or recognised in the US.
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Daughter's Day is celebrated on September 4th every year.