20 Aug
                
                    2012
                
            
            
                20 Aug
                
                '12
                
            
            
            
        
    
                3:55 a.m.
            
        trentbuck@gmail.com
I never found a good document of the syntaxes date -d accepts, so I just guess each time.
http://www.gnu.org/software/coreutils/manual/html_node/date-invocation.html http://www.gnu.org/software/coreutils/manual/html_node/Examples-of-date.html The above is pretty definitive. Or you could search for "relative GNU date formats" xor read the source. ALC