Arbor Day has been observed in Australia since 20 June 1889 .
Many states have Arbor Day although only Victoria has Arbor Week , which was suggested by Premier Dick Hamer in the 1980s .
Arbor Week   has been observed in Australia since 20 June 1889 .
Many states have Arbor Day although only Victoria has Arbor Week , which was suggested by Premier Dick Hamer in the 1980s .