05 March 2009
In your case date of possession will not make any difference. You are owner of property since 28.10.2005 so this date will be considered for calculation the period of holding.
17 March 2009
the query is not clear as to the nature of asset . if land was purchased and building constructed upon the same it will have to be presumed that the possession of the building will be given once the construction is completed. if that is the case the building is existing only from march 2008 . so building is short term and land long term. but the asset is only land date of possession of land is not relevant