to see each nodes date you can open node (i.e. Inventory > Nodes > select and ope node > Registration tab) and check registration field. Other than that, I haven't seen any reports like this (but it doesn't mean it doesn't exist). There also should be some way to query the database.
please use the Custom Node table view from Inventory as it contains the column "Created". You can sort and/or filter on that column and you can export the table by right click in the table and choose "Display Printable Version > All Rows". Then you can copy the content of the rising web window to MS Excel. It is even possible to connect to the NNMi database, but it is not supported and you have to figure out the correct tables and sql statements. Perhaps even the Web API offers this information (but you will need an integration license).