I don't know for 
June 14th, 2010
But if you want 
June 14, 2010
Ref   how do i get name of the month in ruby on Rails?  or this
Just do
@date = Time.now
@date.strftime("%B %d, %Y")
And for suffix use following
@date.strftime("%B #{@date.day.ordinalize}, %Y") # >>> Gives `June 18th, 2010`