SubString of a Date in Apex?

Question

I am trying to navigate the help pages associated with this, and I simply cannot find this simple reference. I want to show the first ten characters from a DateTime (CloseDate on Opportunity):

o.CloseDate.SubString(0,10)

I just want the "2012-11-15" reference pulled out. What am I missing here? :-( Thanks for any help, all.

Answer 1

String myDate = o.CloseDate.year() + '-' + o.CloseDate.month() + '-' + o.CloseDate.day();

Or:

String myDate = String.valueOf(o.CloseDate).SubString(0,10);