[O] Date-tree navigation question

[Robert Horn]

Is there a short simple key sequence that will take you to the last 
entry in a date-tree and open that headline?  Slightly better would be a 
way to go to the last, and open the last N headlines.  It could be 
generalized into "go to end of current item and open last N items of 
whatever depth" when applied to other outline forms.

I know how to do this with tabs and cursor movement to walk down the 
tree opening headlines as needed.  This requires more work and paying 
attention.

I have not found a simple way to do this.  Does one exist?

R Horn