After that , the national government extended it to National Arbor Week , which lasts annually from 1 -- 7 September .
Arbor Day was celebrated from 1945 until 2000 in South Africa .
After that , the national government extended Arbor Day to National Arbor Week , which lasts annually from 1 -- 7 September .
Arbor Day was celebrated from 1945 until 2000 in South Africa .