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- National Arbor Day - the final Friday in April
- International Arbor Day - December 22; the first Arbor Day was celebrated in 1872, in Nebraska, in response to a proclamation urging settlers to
plant trees for providing shade, shelter, fruit, fuel and beauty
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by location
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| Australia and Oceania |
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| Australia - Eastern (Queensland, New South Wales, Australian
Capital Territory, Victoria & Tasmania) |
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| Australia - Central (Northern Territory & South Australia) |
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| Australia - Western Australia |
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| Guam |
- Guam
first Friday in November
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| USA - Alabama |
- Arbor Day Celebration - in Hoover; March 1, 2008; at Aldridge Botanical Gardens
- last full week in February
(state tree: Longleaf Pine)
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| USA - Alaska |
- third Monday in May
(state tree: Sitka Spruce)
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| USA - Arizona |
- last Friday in April
(state tree: Paloverde)
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| USA - Arkansas |
- third Monday in March
(state tree: Pine)
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| USA - California |
- March 7 - 14
(state tree: California Redwood)
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| USA - Colorado |
- third Friday in April
(state tree: Blue Spruce)
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| USA - Connecticut |
- last Friday in April
(state tree: White Oak)
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| USA - Delaware |
- last Friday in April
(state tree: American Holly)
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| USA - District of Columbia |
- last Friday in April
(District tree: Scarlet Oak)
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| USA - Florida |
- third Friday in January (state tree: Cabbage Palmetto)
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| USA - Georgia |
- third Friday in February
(state tree: Live Oak)
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| USA - Hawaii |
- first Friday in November
(state tree: Kukui)
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| USA - Idaho |
- last Friday in April
(state tree: Western White Pine)
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| USA - Illinois |
- last Friday in April
(state tree: White Oak)
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| USA - Indiana |
- last Friday in April
(state tree: Tuliptree)
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| USA - Iowa |
- last Friday in April
(state tree: Oak)
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| USA - Kansas |
- last Friday in April
(state tree: Cottonwood)
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| USA - Kentucky |
- first Friday in April
(state tree: Tulip Poplar)
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| USA - Louisiana |
- Third Friday in January
(state tree: Baldcypress)
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| USA - Maine |
- third full week in May
(state tree: Eastern White Pine)
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| USA - Maryland |
- first Wednesday in April
(state tree: White Oak)
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| USA - Massachusetts |
- last Friday in April
(state tree: American Elm)
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| USA - Michigan |
- last Friday in April
(state tree: Eastern White Pine)
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| USA - Minnesota |
- last Friday in April
(state tree: Red Pine)
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| USA - Mississippi |
- second Friday in February
(state tree: Southern Magnolia)
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| USA - Missouri |
- first Friday in April
(state tree: Flowering Dogwood)
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| USA - Montana |
- last Friday in April
(state tree: Ponderosa Pine)
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| USA - Nebraska |
- last Friday in April
(state tree: Cottonwood)
- Nebraska City - home of Arbor Day
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| USA - Nevada |
- last Friday in April
(state trees: Singleleaf Piņon and Bristlecone Pine)
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| USA - New Hampshire |
- last Friday in April
(state tree: Paper Birch)
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| USA - New Jersey |
- last Friday in April
(state tree: Northern Red Oak)
- Arbor Day Celebration - in Princeton; April 25, 2008; at Terhune Orchards
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| USA - New Mexico |
- second Friday in March
(state tree: Piņon)
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| USA - New York |
- last Friday in April
(state tree: Sugar Maple)
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| USA - North Carolina |
- first Friday following March 15
(state tree: Pine)
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| USA - North Dakota |
- first Friday in May
(state tree: American Elm)
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| USA - Ohio |
- last Friday in April
(state tree: Ohio Buckeye)
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| USA - Oklahoma |
- last full week in March
(state tree: Eastern Redbud)
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| USA - Oregon |
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| USA - Pennsylvania |
- last Friday in April
(state tree: Eastern Hemlock)
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| USA - Rhode Island |
- last Friday in April
(state tree: Red Maple)
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| USA - South Carolina |
- first Friday in December
(state tree: Cabbage Palmetto)
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| USA - South Dakota |
- last Friday in April
(state tree: White Spruce)
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| USA - Tennessee |
- first Friday in March
(state tree: Yellow Poplar)
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| USA - Texas |
- last Friday in April
(state tree: Pecan)
- Arbor Day Celebration, Houston Arboretum, Houston, Texas; January 18, 2003
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| USA - Utah |
- last Friday in April
(state tree: Blue Spruce)
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| USA - Vermont |
- first Friday in May
(state tree: Sugar Maple)
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| USA - Virginia |
- second Friday in April
(state tree: Flowering Dogwood)
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| USA - Washington |
- second Wednesday in April
(state tree: Western Hemlock)
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| USA - West Virginia |
- second Friday in April
(state tree: Sugar Maple)
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| USA - Wisconsin |
- last Friday in April
(state tree: Sugar Maple)
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| USA - Wyoming |
- last Monday in April
(state tree: Cottonwood)
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| U.S. Virgin Islands |
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directories
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